drm/i915/irq: Pair up the vblank enable/disable functions

drm/i915/irq: Pair up the vblank enable/disable functions

The current way of organizing all .vblank_enable() functions
before all .vblabk_disable() functions is infuriating. It's
really hard to compare the enable() vs. disable() for the
same platform to make sure they properly mirror each other.

Reorganize the functions so that the enable+disable for
the same platoform are next to each.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241001195803.3371-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>