egl/wayland: Fix ARGB/XRGB transposition in config map

egl/wayland: Fix ARGB/XRGB transposition in config map

When 0b2b7191214eb moved from an if tree to a struct to map between
wl_drm formats and EGLConfigs, it transposed the mapping between XRGB
and ARGB. Luckily, everyone exposes both formats, so this is harmless.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Fixes: 0b2b7191214eb ("egl/wayland: introduce dri2_wl_add_configs_for_visuals() helper")
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Ilia Mirkin <imirkin@alum.mit.edu>