[media] s5p-mfc: Correct scratch buffer size of H.263 decoder

Driver complains about too small scratch buffer size. After adjusting
it according to vendor code, decoding works.

[mszyprow: moved the change to the header file]
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/s5p-mfc/regs-mfc-v6.h

@@ -386,7 +386,8 @@
 			((w) * 144 + 8192 * (h) + 49216 + 1048576)
 #define S5P_FIMV_SCRATCH_BUF_SIZE_VC1_DEC_V6(w, h) \
 						(2096 * ((w) + (h) + 1))
-#define S5P_FIMV_SCRATCH_BUF_SIZE_H263_DEC_V6(w, h)	((w) * 400)
+#define S5P_FIMV_SCRATCH_BUF_SIZE_H263_DEC_V6(w, h)	\
+			S5P_FIMV_SCRATCH_BUF_SIZE_MPEG4_DEC_V6(w, h)
 #define S5P_FIMV_SCRATCH_BUF_SIZE_VP8_DEC_V6(w, h) \
 			((w) * 32 + (h) * 128 + (((w) + 1) / 2) * 64 + 2112)
 #define S5P_FIMV_SCRATCH_BUF_SIZE_H264_ENC_V6(w, h) \