drm/i915: move intel_dram.[ch] from soc/ to display/
The remaining users of intel_dram.[ch] are all in display. Move them
under display.
This allows us to remove the compat soc/intel_dram.h from xe.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/4c0fbdab989a70d287536a7eafb002dc836ced12.1763578288.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>