arcnet: com20020-pci: add led trigger support

The EAE PLX-PCI card has special leds on the the main io pci resource
bar. This patch adds support to trigger the conflict and data leds with
the packages.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

arcnet: com20020-pci: add rotary index support

The EAE PLX-PCI card has a special rotary encoder
to configure the address of every card individually.
We take this information for the initial setup of
the cards dev_id.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

arcnet: com20020: replace magic numbers with readable macros

This patch replaces all magic numbers in the driver with
proper named macros. For the case of XTOcfg and STARTIOcmd
it introduces the new macros.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

arcnet: com20020: Use arcnet_<I/O> routines

Simplify and make consistent the current uses of inb/outb
by using the newly introduced arcnet_<I/O> equivalents.

o Add new #defines for register offsets
There is an register offset, 8, that is unnamed and used as-is.
o Remove old #defines that included the ioaddr
o Remove obfuscating macros by expanding them in-place where appropriate
o Create static inline com20020_set_subaddress for the SET_SUBADR macro

There is an unused arcnet config entry CONFIGSA100_CT6001 which added a
special #define BUS_ALIGN which was introduced but never used in fullhist git
tree commit 22cfce4b82b0 ("[ARCNET]: Fixes.") in Nov 2004 for Linux v2.6.10.

This BUS_ALIGN #define tries to allow 8 bit devices to work on a 16 bit
bus by aligning addresses to 16 bit boundaries.

Move this currently unused CONFIG_SA1100_CT6001 BUS_ALIGN macro from
com20020.h to arcdevice.h.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

arcnet: Move files out of include/linux

These #include files don't need to be in the include/linux directory
as they can be local to drivers/net/arcnet/

Move them and update the #include statements.

Update the MAINTAINERS file pattern by deleting arcdevice from the
NETWORKING block as arcnet is currently unmaintained.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>