media: vicodec: bugfix - replace '=' with '|='

In the fwht_encode_frame, 'encoding = encode_plane'
should be replaced with 'encoding |= encode_plane'
so existing flags won't be overwrriten.
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vicodec/codec-fwht.c

@@ -787,7 +787,7 @@ u32 fwht_encode_frame(struct fwht_raw_frame *frm,
 
 	if (frm->components_num == 4) {
 		rlco_max = rlco + size / 2 - 256;
-		encoding = encode_plane(frm->alpha, ref_frm->alpha, &rlco,
+		encoding |= encode_plane(frm->alpha, ref_frm->alpha, &rlco,
 					 rlco_max, cf, frm->height, frm->width,
 					 frm->luma_alpha_step,
 					 is_intra, next_is_intra);