media: vim2m: ensure that width is multiple of two

The copy logic assumes that the data width is multiple of two,
as this is needed in order to support YUYV.

There's no reason to force it to be 8-pixel aligned, as 2-pixel
alignment is enough.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vim2m.c

@@ -50,7 +50,7 @@ MODULE_PARM_DESC(default_transtime, "default transaction time in ms");
 #define MIN_H 32
 #define MAX_W 640
 #define MAX_H 480
-#define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
+#define DIM_ALIGN_MASK 1 /* 2-byte alignment */
 
 /* Flags that indicate a format can be used for capture/output */
 #define MEM2MEM_CAPTURE	(1 << 0)