[media] s5p-jpeg: get rid of some warnings

Declare this as static:

drivers/media/platform/s5p-jpeg/jpeg-core.c:732:6: warning: no previous prototype for 'exynos4_jpeg_set_huff_tbl' [-Wmissing-prototypes]
 void exynos4_jpeg_set_huff_tbl(void __iomem *base)
      ^

And don't compile this dead code, while not needed:
drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c:236:14: warning: no previous prototype for 'exynos3250_jpeg_get_y' [-Wmissing-prototypes]
 unsigned int exynos3250_jpeg_get_y(void __iomem *regs)
              ^
drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c:241:14: warning: no previous prototype for 'exynos3250_jpeg_get_x' [-Wmissing-prototypes]
 unsigned int exynos3250_jpeg_get_x(void __iomem *regs)
              ^
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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

@@ -729,7 +729,7 @@ static inline void exynos4_jpeg_set_qtbl_chr(void __iomem *regs, int quality)
 			     ARRAY_SIZE(qtbl_chrominance[quality]));
 }
 
-void exynos4_jpeg_set_huff_tbl(void __iomem *base)
+static void exynos4_jpeg_set_huff_tbl(void __iomem *base)
 {
 	exynos4_jpeg_set_tbl(base, hdctbl0, EXYNOS4_HUFF_TBL_HDCLL,
 							ARRAY_SIZE(hdctbl0));

drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c

@@ -233,6 +233,7 @@ void exynos3250_jpeg_set_x(void __iomem *regs, unsigned int x)
 	writel(reg, regs + EXYNOS3250_JPGX);
 }
 
+#if 0	/* Currently unused */
 unsigned int exynos3250_jpeg_get_y(void __iomem *regs)
 {
 	return readl(regs + EXYNOS3250_JPGY);
@@ -242,6 +243,7 @@ unsigned int exynos3250_jpeg_get_x(void __iomem *regs)
 {
 	return readl(regs + EXYNOS3250_JPGX);
 }
+#endif
 
 void exynos3250_jpeg_interrupts_enable(void __iomem *regs)
 {