Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

dtc.1: Fix the display of directives ending with semicolons

While here, fix a typo and bump the date.

Obtained from: https://github.com/davidchisnall/dtc/pull/71
Fixes: 6979e8cb6e62f04688611aed796712fde1a981d6

dtc: more mandoc -T lint fixes

Obtained from: dtc repo 04c805a8b08e4a1d4ff1f1e62ef475fbfe1a5fbe
Sponsored by: Netflix

dtc.1: Mention the existence of -i flag

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/570

dtc.1: Appease mandoc -T lint

Prefer .Fx to bare FreeBSD

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/579

dtc(1): Update to 1a79f5f26631

Highlights:
- Bugfix for order in which /delete-node/ and /delete-property/ are
processed [0]
- /omit-if-no-ref/ support has been added (used only by U-Boot at this
point, in theory)
- GPL dtc compat version bumped to 1.4.7
- Various small fixes and compatibility improvements

Reported by: strejda [0]
MFC after: 1 week

minor grammar nit, to what? between them..

dtc(1): Update to upstream 006664a

Highlights:

- Passing "-" to -o will now cause output to go to stdout
- Path-based syntactic sugar for overlays is now accepted. This looks like:

/dts-v1/;
/plugin/;

&{/soc} {
sid: eeprom@1c14000 {
compatible = "allwinner,sun8i-h3-sid";
reg = <0x1c14000 0x400>;
status = "okay";
};
};

MFC after: 3 days

dtc(1): Update to upstream ea3c233

Highlights of this update:
- /__local_fixups__ is now generated to be GPL dtc and libfdt compliant
- Compiling with -@ will now cause dtc to assign phandles to all labelled
nodes
- /include/ and /incbin/ now handle absolute paths correctly
- The manpage now has information about overlays, including how to apply
them and how to generate them
- Syntactic sugar for overlays is now supported, allowing an overlay DTS
like:

=
/dts-v1/;
/plugin/;

&foo {
foo,status = "okay";
};
=

to generate a fragment targetting <&foo>.

dtc: update to upstream 227d6a3

- Report missing includes at the correct location.
- Add initial support for the -@ option emitting a symbol table.
- Add support for running tests with and without -@
- Add support for generating __fixups__ and __local_fixups__
- Attach the to-string transform to the node path.

Improvements to BSD-licensed DTC.

- Numerous crash and bug fixes
- Improved warning and error messages
- Permit multiple labels on nodes and properties
- Fix node@address references
- Add support for /delete-node/
- Consume whitespace after a node
- Read the next token before the second /memreserve/
- Fix parsing of whitespace
- Clean up /delete-node/ and add support for /delete-property/
- Handle /delete-node/ specifying a unit address

Obtained from: https://github.com/davidchisnall/dtc @df5ede4

Remove EOL whitespace.

Add support for parameterised device tree sources to the device tree compiler.

Reviewed by: brooks
Sponsored by: DARPA, AFRL

Add a checker to dtc, based on a feature request from rwatson / brooks.
This checks that every node that has children specifies their register sizes.
This is not enabled by default, as the default sizes are sometimes required
(including by some DTS in the tree), but can help when writing new device
trees so that you can check that you actually meant the defaults.

Fix style nit in dtc man page: sentences should start on new lines.

Reported By: joel

Remove EOL whitespace.

Minor mdoc fixes.

Fix the missing sentence that ended in the middle in the man page for dtc (also
spotted by gavin).

Import new (BSDL) device tree compiler. Now built by default, so that it can't
be used on the host system (and not installed on the device, if required). The
GPL'd one is still available if there are any devices that need it (make
universe passes with it, including kernels that use fdt, but there may be some
out-of-tree ones). WITH_GPL_DTC can be used to select the old one, for now.

Probably won't be MFC'd, but we'll remove the GPL'd version in head after the
new one has had a lot more testing and ship it in 10.0.