Convert CONFIG_VIDEO_OMAP3 to Kconfig

This converts the following to Kconfig:
   CONFIG_VIDEO_OMAP3

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/mt_ventoux_defconfig b/configs/mt_ventoux_defconfig
index ab3a904..ae88b76 100644
--- a/configs/mt_ventoux_defconfig
+++ b/configs/mt_ventoux_defconfig
@@ -46,6 +46,7 @@
 CONFIG_USB_ULPI_VIEWPORT_OMAP=y
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
+CONFIG_VIDEO_OMAP3=y
 CONFIG_VIDEO=y
 # CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_OF_LIBFDT=y