src/lib: Wrap lines at 80 columns

Fix the following warning detected by checkpatch.pl:

WARNING: line over 80 characters

TEST=Build and run on Galileo Gen2

Change-Id: I5fa3f8e950e2f0c60bd0e8f030342dc8c0469299
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18758
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/lib/jpeg.h

@@ -44,7 +44,8 @@ struct jpeg_decdata {
 	int dquant[3][64];
 };
 
-int jpeg_decode(unsigned char *, unsigned char *, int, int, int, struct jpeg_decdata *);
+int jpeg_decode(unsigned char *, unsigned char *, int, int, int,
+	struct jpeg_decdata *);
 void jpeg_fetch_size(unsigned char *buf, int *width, int *height);
 int jpeg_check_size(unsigned char *, int, int);