dt-bindings: camera: Add mask for HW based clock scaling

Add mask for camera clock drv.

CRs-Fixed: 3294948
Change-Id: If7ad9cb1476603e188dbe16daad31b3c0740cf02
Signed-off-by: Mukund Madhusudan Atre <[email protected]>

dt-bindings/msm-camera.h

@@ -112,6 +112,7 @@
 
 /* Camera DRV enable masks */
 #define CAM_DDR_DRV    0x1
+#define CAM_CLK_DRV    0x2
 
 /* Port index for BW voting */
 #define CAM_CPAS_PORT_HLOS_DRV    0