[media] atomisp: Make undeclared symbols static

Fix sparse warnings: "symbol not declared; should it be static?"
Signed-off-by: NGuru Das Srinagesh <gurooodas@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/atomisp/pci/atomisp2/atomisp_fops.c

@@ -130,7 +130,7 @@ static int atomisp_q_one_metadata_buffer(struct atomisp_sub_device *asd,
 	return 0;
 }
 
-int atomisp_q_one_s3a_buffer(struct atomisp_sub_device *asd,
+static int atomisp_q_one_s3a_buffer(struct atomisp_sub_device *asd,
 				    enum atomisp_input_stream_id stream_id,
 				    enum atomisp_css_pipe_id css_pipe_id)
 {
@@ -172,7 +172,7 @@ int atomisp_q_one_s3a_buffer(struct atomisp_sub_device *asd,
 	return 0;
 }
 
-int atomisp_q_one_dis_buffer(struct atomisp_sub_device *asd,
+static int atomisp_q_one_dis_buffer(struct atomisp_sub_device *asd,
 				    enum atomisp_input_stream_id stream_id,
 				    enum atomisp_css_pipe_id css_pipe_id)
 {
@@ -744,7 +744,7 @@ static void atomisp_subdev_init_struct(struct atomisp_sub_device *asd)
 /*
  * file operation functions
  */
-unsigned int atomisp_subdev_users(struct atomisp_sub_device *asd)
+static unsigned int atomisp_subdev_users(struct atomisp_sub_device *asd)
 {
 	return asd->video_out_preview.users +
 	       asd->video_out_vf.users +