drm/i915/display: Add meaningful traces for QGV point info error handling

For debug purposes we need those - error path won't flood the log,
however there has been already numerous cases, when due to lack
of debugs, we couldn't immediately tell what was the problem on
customer machine, which slowed down the investigation, requiring
to get access to target device and adding those traces manually.

v2: - Make the debug more generic and move it to intel_dram_detect
(Gustavo Sousa)
v3: - Use %u for unsigned variable in debug prints (Gustavo)

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405113533.338553-2-vinod.govindapillai@intel.com

drm/i915/dram: replace __raw_uncore_read32() with intel_uncore_read_fw()

The __raw_uncore_* interface is supposed to be intel_uncore.[ch]
internal only. Replace the remaining outside user with
intel_uncore_read_fw(), which is essentially the same thing.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230627105849.274263-1-jani.nikula@intel.com

drm/i915: move memory frequency detection to intel_dram.c

The memory frequency detection is a bit spread out here and
there. Consolidate to intel_dram.c.

v2:
- Remove inaccurate comment (Ville)
- Call detect_mem_freq() unconditionally (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8a862eeca8b42a98e04b3c52637851d33531abb6.1676317696.git.jani.nikula@intel.com

drm/i915: add new "soc" sub-directory and move PCH and DRAM code there

Add a new sub-directory for things that aren't specifically about the
GPU and don't really belong in the i915 driver top level, but also don't
belong under any of the existing sub-directories either.

Name it "soc", and move the PCH and DRAM code there.

Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221208142347.602726-1-jani.nikula@intel.com