drm/i915: Extract intel_pipe_crc_regs.h

The CRC registers are a pretty self contained bunch.
Extract them to a separate header to declutter i915_reg.h.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531115342.2763-2-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>