ARM: davinci: fix const warnings

After VPIF was converted to enable getting subdevs from DT, the
pdata is no longer const, so remove these to avoid compiler warnings.

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
[nsekhar@ti.com: minor commit message fixup]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/board-dm646x-evm.c

@@ -641,7 +641,7 @@ static struct vpif_subdev_info vpif_capture_sdev_info[] = {
 	},
 };
 
-static const struct vpif_input dm6467_ch0_inputs[] = {
+static struct vpif_input dm6467_ch0_inputs[] = {
 	{
 		.input = {
 			.index = 0,
@@ -656,7 +656,7 @@ static const struct vpif_input dm6467_ch0_inputs[] = {
 	},
 };
 
-static const struct vpif_input dm6467_ch1_inputs[] = {
+static struct vpif_input dm6467_ch1_inputs[] = {
        {
 		.input = {
 			.index = 0,