The new A1B5G5R5_UNORM, X1B5G5R5_UNORM formats were added in the
wrong place in commit ef874ee450.
Fixes: ef874ee450 "gallium: Add support for 5551 with the 1-bit field in the low bit."
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>