msm: camera: Convert CSID into platform device

Make CSID 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: Icdb7d878456e749500b3e7a9e183997dba651cfd
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 537605b..507bc32 100644
--- a/arch/arm/mach-msm/board-msm8960.c
+++ b/arch/arm/mach-msm/board-msm8960.c
@@ -1422,6 +1422,8 @@
 
 	platform_device_register(&msm8960_device_csiphy0);
 	platform_device_register(&msm8960_device_csiphy1);
+	platform_device_register(&msm8960_device_csid0);
+	platform_device_register(&msm8960_device_csid1);
 }
 #endif