drm/i915: move rawclk from runtime to display runtime info

drm/i915: move rawclk from runtime to display runtime info

It's mostly about display, so move it under display. This should also
fix rawclk freq initialization in the xe driver.

v2: Change the init location

Link: https://lore.kernel.org/r/20240819133138.147511-2-maarten.lankhorst@linux.intel.com
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/39330d09c48509e013f01fd0247a9b7c291173e2.1724144570.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>