drm/i915: Relocate RING_FAULT bits

drm/i915: Relocate RING_FAULT bits

We share the bit definitions between the older
RING_FAULT registers and their various gen12+
counterparts. Currently the bits are defined next
to the new registers which isn't what we typically do.

Move the bit definitions next the older register offsets,
and leave breadcrumbs around the gen12+ registers to make
it easier to find the right bits.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250211231941.22769-3-ville.syrjala@linux.intel.com