[media] Don't export format_by_forcc on two different drivers

Drivers should append their name on exported symbols, to avoid
conflicts with allyesconfig:

drivers/staging/built-in.o: In function `format_by_fourcc':
/home/v4l/work_trees/linus/drivers/staging/cx25821/cx25821-video.c:96: multiple definition of `format_by_fourcc'
drivers/media/built-in.o:/home/v4l/work_trees/linus/drivers/media/common/saa7146_video.c:88: first defined here

Let's rename both occurences with a small shellscript:

for i in drivers/staging/cx25821/*.[ch]; do sed s,format_by_fourcc,cx25821_format_by_fourcc,g <$i >a && mv a $i; done
for i in drivers/media/common/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done
for i in include/media/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/common/saa7146_hlp.c b/drivers/media/common/saa7146_hlp.c
index 05bde9c..1d1d8d2 100644
--- a/drivers/media/common/saa7146_hlp.c
+++ b/drivers/media/common/saa7146_hlp.c
@@ -558,7 +558,7 @@
 static void saa7146_set_position(struct saa7146_dev *dev, int w_x, int w_y, int w_height, enum v4l2_field field, u32 pixelformat)
 {
 	struct saa7146_vv *vv = dev->vv_data;
-	struct saa7146_format *sfmt = format_by_fourcc(dev, pixelformat);
+	struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev, pixelformat);
 
 	int b_depth = vv->ov_fmt->depth;
 	int b_bpl = vv->ov_fb.fmt.bytesperline;
@@ -702,7 +702,7 @@
 	struct saa7146_vv *vv = dev->vv_data;
 	struct saa7146_video_dma vdma1;
 
-	struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
+	struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 
 	int width = buf->fmt->width;
 	int height = buf->fmt->height;
@@ -827,7 +827,7 @@
 	struct saa7146_video_dma vdma2;
 	struct saa7146_video_dma vdma3;
 
-	struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
+	struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 
 	int width = buf->fmt->width;
 	int height = buf->fmt->height;
@@ -994,7 +994,7 @@
 
 void saa7146_set_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next)
 {
-	struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
+	struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
 	struct saa7146_vv *vv = dev->vv_data;
 	u32 vdma1_prot_addr;