Change default visual to have a depth of bitsPerPixel.
Change default visual to have a depth of bitsPerPixel.

This results in the default visual including alpha in the depth.
This is the behavour expected by the xorg render implementation, so appears
to be reasonably standard.

commshare/xf86-video-armsoc,xin3liang/xf86-video-armsoc,Popolon/xf86-video-armsoc,apxii/xf86-video-armsoc,sbambrough/xf86-video-armsoc,commshare/xf86-video-armsoc,mdrjr/xf86-video-armsoc,mmind/xf86-video-armsoc,apxii/xf86-video-armsoc,freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc,Popolon/xf86-video-armsoc,xin3liang/xf86-video-armsoc,OtherCrashOverride/armsoc-hardkernel,mdrjr/xf86-video-armsoc,sbambrough/xf86-video-armsoc,singulared/xf86-video-armsoc,mmind/xf86-video-armsoc,freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc,singulared/xf86-video-armsoc,OtherCrashOverride/armsoc-hardkernel