ARM: OMAP3+: PRM: add common APIs for prm_vp_check/clear_txdone

PRM driver now only exports a generic API for clearing / checking
VP txdone status.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --cc arch/arm/mach-omap2/prm.h
Simple merge

diff --cc arch/arm/mach-omap2/prm3xxx.c
Simple merge

diff --cc arch/arm/mach-omap2/prm3xxx.h
Simple merge

diff --cc arch/arm/mach-omap2/prm44xx.c
Simple merge

diff --cc arch/arm/mach-omap2/prm44xx_54xx.h
Simple merge

diff --cc arch/arm/mach-omap2/prm_common.c
Simple merge

diff --cc arch/arm/mach-omap2/vp.h
Simple merge

diff --cc arch/arm/mach-omap2/vp3xxx_data.c
Simple merge

diff --cc arch/arm/mach-omap2/vp44xx_data.c
Simple merge