ARM: OMAP2+: make omap_dma_dev_info __initdata

Make this __initdata as it is only modified only during the initialisation
phase in the function omap2_system_dma_init_dev and after this it is not
referenced anywhere in the kernel.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/dma.c

@@ -223,7 +223,7 @@ static struct omap_system_dma_plat_info dma_plat_info __initdata = {
 	.dma_read	= dma_read,
 };
 
-static struct platform_device_info omap_dma_dev_info = {
+static struct platform_device_info omap_dma_dev_info __initdata = {
 	.name = "omap-dma-engine",
 	.id = -1,
 	.dma_mask = DMA_BIT_MASK(32),