[media] s5p-jpeg: Perform fourcc downgrade only for Exynos4x12 SoCs

Change the driver variant check from "is not S5PC210"
to "is Exynos4" while checking whether YUV format needs
to be downgraded in order to prevent upsampling which
is not supported by Exynos4 SoCs family.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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

@@ -1070,7 +1070,7 @@ static int s5p_jpeg_try_fmt_vid_cap(struct file *file, void *priv,
 	 * If this requirement is not met then downgrade the requested
 	 * capture format to the one with subsampling equal to the input jpeg.
 	 */
-	if ((ctx->jpeg->variant->version != SJPEG_S5P) &&
+	if ((ctx->jpeg->variant->version == SJPEG_EXYNOS4) &&
 	    (ctx->mode == S5P_JPEG_DECODE) &&
 	    (fmt->flags & SJPEG_FMT_NON_RGB) &&
 	    (fmt->subsampling < ctx->subsampling)) {