drm/i915/display: drop unnecessary i915_drv.h includes

Now that we don't include i915_drv.h via any headers from display, we
can reliably remove unnecessary i915_drv.h includes and be sure they're
not indirectly included. Add other includes where needed.

v2: Fix 32-bit build

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217132147.2008057-1-jani.nikula@intel.com


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