[media] v4l: omap4iss: configuration using uninitialized variable

Variable reg is not initialized.
Random values are written to OMAP4 ISS registers if !ctx->eof_enabled.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/staging/media/omap4iss/iss_csi2.c

@@ -317,7 +317,7 @@ static void csi2_ctx_enable(struct iss_csi2_device *csi2, u8 ctxnum, u8 enable)
 static void csi2_ctx_config(struct iss_csi2_device *csi2,
 			    struct iss_csi2_ctx_cfg *ctx)
 {
-	u32 reg;
+	u32 reg = 0;
 
 	/* Set up CSI2_CTx_CTRL1 */
 	if (ctx->eof_enabled)