msm: camera: Add actuator driver

Add actuator driver that is responsible to move the actuator lens
for auto focus functionality. Register platform driver and create
v4l2 subdevice during probing. Add config functions for power up,
power down and move focus.

Change-Id: Icabf5dbd88fa64ea0a007834ffdd7a2b81eae567
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>
[smuckle@codeaurora.org: backported from msm-3.7]
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
diff --git a/arch/arm/mach-msm/include/mach/camera2.h b/arch/arm/mach-msm/include/mach/camera2.h
index 88e2f12..af2a2fd 100644
--- a/arch/arm/mach-msm/include/mach/camera2.h
+++ b/arch/arm/mach-msm/include/mach/camera2.h
@@ -17,9 +17,9 @@
 #include <media/msm_cam_sensor.h>
 #include <mach/board.h>
 
-enum msm_sensor_device_type_t {
-	MSM_SENSOR_I2C_DEVICE,
-	MSM_SENSOR_PLATFORM_DEVICE,
+enum msm_camera_device_type_t {
+	MSM_CAMERA_I2C_DEVICE,
+	MSM_CAMERA_PLATFORM_DEVICE,
 };
 
 enum msm_bus_perf_setting {