pm2fb: RDAC_WR barriers clean up
pm2fb: RDAC_WR barriers clean up

This patch fixes a possible barriers problem in RDAC_WR functions, then
remove redudant ones.

It also removes one unneeded register load from blitter function().

Signed-off-by: Krzysztof.Helt <e36322531041744f35a39a40f0faffcfb5b388ff@wp.pl>
Signed-off-by: Antonino Daplas <be03a811842969f6b435f66cb85a30eb479a8702@gmail.com>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs