media: atomisp: Make atomisp_set_raw_buffer_bitmap() static

atomisp_set_raw_buffer_bitmap() is only used in atomisp_cmd.c,
make it static. Unfortunately this still requires a forward
declaration (the function cannot be moved easily).

Still this will at least make it obvious to anyone reading the code
that the function is not used elsewhere.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_cmd.c

@@ -80,6 +80,8 @@ union host {
 	} ptr;
 };
 
+static int atomisp_set_raw_buffer_bitmap(struct atomisp_sub_device *asd, int exp_id);
+
 /*
  * get sensor:dis71430/ov2720 related info from v4l2_subdev->priv data field.
  * subdev->priv is set in mrst.c
@@ -5993,7 +5995,7 @@ void atomisp_init_raw_buffer_bitmap(struct atomisp_sub_device *asd)
 	spin_unlock_irqrestore(&asd->raw_buffer_bitmap_lock, flags);
 }
 
-int atomisp_set_raw_buffer_bitmap(struct atomisp_sub_device *asd, int exp_id)
+static int atomisp_set_raw_buffer_bitmap(struct atomisp_sub_device *asd, int exp_id)
 {
 	int *bitmap, bit;
 	unsigned long flags;

drivers/staging/media/atomisp/pci/atomisp_cmd.h

@@ -321,8 +321,6 @@ void atomisp_flush_params_queue(struct atomisp_video_pipe *asd);
 int atomisp_exp_id_unlock(struct atomisp_sub_device *asd, int *exp_id);
 int atomisp_exp_id_capture(struct atomisp_sub_device *asd, int *exp_id);
 
-/* Function to update Raw Buffer bitmap */
-int atomisp_set_raw_buffer_bitmap(struct atomisp_sub_device *asd, int exp_id);
 void atomisp_init_raw_buffer_bitmap(struct atomisp_sub_device *asd);
 
 /* Function to enable/disable zoom for capture pipe */