msm: camera: Convert VFE into platform device

Make VFE platform devices as well as
v4l2 sub-devices. They are created at system boot-up,
and registered during camera open.

The subdevices are decoupled from the v4l2 devices by
using device model APIs to find and register them.

Change-Id: I91a7144794505af23a6f32de58f1c7cc340f4882
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-msm8960.c b/arch/arm/mach-msm/board-msm8960.c
index 892921a..a7cc933 100644
--- a/arch/arm/mach-msm/board-msm8960.c
+++ b/arch/arm/mach-msm/board-msm8960.c
@@ -1425,6 +1425,7 @@
 	platform_device_register(&msm8960_device_csid0);
 	platform_device_register(&msm8960_device_csid1);
 	platform_device_register(&msm8960_device_ispif);
+	platform_device_register(&msm8960_device_vfe);
 }
 #endif