drm/i915: Sort bdw+ pipe interrupt bits

drm/i915: Sort bdw+ pipe interrupt bits

It's really hard to figure out which bdw+ pipe interrupt bits
we've defined and which we have not. Sort the defines to make
that a bit easier (still not super easy since the bits have
been shuffled a bit over the years).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240605111832.21373-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>