arm/dts: OMAP4: Add Variscite OMAP4 System-On-Modeule support

Add Variscite OMAP4 System-On-Modeule support

Signed-off-by: Uri Yosef <uri.y@variscite.com>
[tony@atomide.com: updated to use disabled instead of disable]
Signed-off-by: Tony Lindgren <tony@atomide.com>