[media] s5p-jpeg: Get rid of a warning

drivers/media/platform/s5p-jpeg/jpeg-hw-s5p.c: In function 's5p_jpeg_clear_int':
drivers/media/platform/s5p-jpeg/jpeg-hw-s5p.c:327:16: warning: variable 'reg' set but not used [-Wunused-but-set-variable]
  unsigned long reg;
                ^
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/s5p-jpeg/jpeg-hw-s5p.c

@@ -326,7 +326,7 @@ void s5p_jpeg_clear_int(void __iomem *regs)
 {
 	unsigned long reg;
 
-	reg = readl(regs + S5P_JPGINTST);
+	readl(regs + S5P_JPGINTST);
 	writel(S5P_INT_RELEASE, regs + S5P_JPGCOM);
 	reg = readl(regs + S5P_JPGOPR);
 }