davinci: make PCM platform devices static

Make the PCM device structures used in devices.c
and devices-da8xx.c static as they are used only
in the respective files.

This was found when trying to build a single image
for DaVinci and DA8x devices using runtime P2V support.
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/devices-da8xx.c

@@ -494,7 +494,7 @@ static struct platform_device da850_mcasp_device = {
 	.resource	= da850_mcasp_resources,
 };
 
-struct platform_device davinci_pcm_device = {
+static struct platform_device davinci_pcm_device = {
 	.name	= "davinci-pcm-audio",
 	.id	= -1,
 };

arch/arm/mach-davinci/devices.c

@@ -298,7 +298,7 @@ static void davinci_init_wdt(void)
 
 /*-------------------------------------------------------------------------*/
 
-struct platform_device davinci_pcm_device = {
+static struct platform_device davinci_pcm_device = {
 	.name		= "davinci-pcm-audio",
 	.id		= -1,
 };