OMAP: Convert write/read functions to raw read/write

Following sparse warnings exists due to use of writel/w and readl/w functions.

This patch fixes the sparse warnings by converting readl/w functions usage into
__raw_readl/__raw_readw functions.

arch/arm/mach-omap2/board-omap3evm.c:77:12: warning: symbol '__v' shadows an earlier one
arch/arm/mach-omap2/board-omap3evm.c:77:12: originally declared here

arch/arm/mach-omap2/gpmc-onenand.c:49:8: warning: symbol '__v' shadows an earlier one
arch/arm/mach-omap2/gpmc-onenand.c:49:8: originally declared here
arch/arm/mach-omap2/gpmc-onenand.c:89:8: warning: symbol '__v' shadows an earlier one
arch/arm/mach-omap2/gpmc-onenand.c:89:8: originally declared here
arch/arm/mach-omap2/gpmc-onenand.c:101:8: warning: symbol '__v' shadows an earlier one
arch/arm/mach-omap2/gpmc-onenand.c:101:8: originally declared here
arch/arm/mach-omap2/gpmc-onenand.c:151:9: warning: symbol '__v' shadows an earlier one
arch/arm/mach-omap2/gpmc-onenand.c:151:9: originally declared here

arch/arm/plat-omap/dmtimer.c:295:10: warning: symbol '__v' shadows an earlier one
arch/arm/plat-omap/dmtimer.c:295:10: originally declared here
arch/arm/plat-omap/dmtimer.c:298:9: warning: symbol '__v' shadows an earlier one
arch/arm/plat-omap/dmtimer.c:298:9: originally declared here
arch/arm/plat-omap/dmtimer.c:311:10: warning: symbol '__v' shadows an earlier one
arch/arm/plat-omap/dmtimer.c:311:10: originally declared here

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mtd@lists.infradead.org