media: imx274: Silence uninitialized variable warning

Smatch complains that "err" can be uninitialized if we have a zero size
write.  The flow analysis is a little complicated so I'm not sure if
that's possible or not, but it's harmless to set this to zero and it
makes the code easier to read.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/imx274.c

@@ -634,7 +634,7 @@ static int imx274_regmap_util_write_table_8(struct regmap *regmap,
 					    const struct reg_8 table[],
 					    u16 wait_ms_addr, u16 end_addr)
 {
-	int err;
+	int err = 0;
 	const struct reg_8 *next;
 	u8 val;