[media] vivid: don't use more than 1024 bytes of stack

Remove the following compilation warnings:

	drivers/media/platform/vivid/vivid-tpg.c: In function 'tpg_gen_text':
	drivers/media/platform/vivid/vivid-tpg.c:1562:1: warning: the frame size of 1308 bytes is larger than 1024 bytes [-Wframe-larger-than=]
	 }
	 ^

This seems to be due to some bad optimization done by gcc.

Moving the for() loop to happen inside the macro solves the
issue.

While here, fix CodingStyle at the switch().
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

drivers/media/platform/vivid/vivid-tpg.c

@@ -1492,12 +1492,10 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 	else if (tpg->field == V4L2_FIELD_SEQ_TB || tpg->field == V4L2_FIELD_SEQ_BT)
 		div = 2;
 
-	for (p = 0; p < tpg->planes; p++) {
-		unsigned vdiv = tpg->vdownsampling[p];
-		unsigned hdiv = tpg->hdownsampling[p];
-
-		/* Print text */
-#define PRINTSTR(PIXTYPE) do {	\
+	/* Print text */
+#define PRINTSTR(PIXTYPE) for (p = 0; p < tpg->planes; p++) {	\
+	unsigned vdiv = tpg->vdownsampling[p];	\
+	unsigned hdiv = tpg->hdownsampling[p];	\
 	PIXTYPE fg;	\
 	PIXTYPE bg;	\
 	memcpy(&fg, tpg->textfg[p], sizeof(PIXTYPE));	\
@@ -1548,16 +1546,19 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 	}	\
 } while (0)
 
-		switch (tpg->twopixelsize[p]) {
-		case 2:
-			PRINTSTR(u8); break;
-		case 4:
-			PRINTSTR(u16); break;
-		case 6:
-			PRINTSTR(x24); break;
-		case 8:
-			PRINTSTR(u32); break;
-		}
+	switch (tpg->twopixelsize[p]) {
+	case 2:
+		PRINTSTR(u8);
+		break;
+	case 4:
+		PRINTSTR(u16);
+		break;
+	case 6:
+		PRINTSTR(x24);
+		break;
+	case 8:
+		PRINTSTR(u32);
+		break;
 	}
 }