MLK-21956-1 i2c-mux-gpio: Fix GPIO request flag issue

When requesting GPIO, the GPIOD_IS_OUT is missed in flag, so the GPIO
is set the input mode not output and cause mux not work.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 4fd2f04db1513d4bcd294a4c94193a4d59785b6d)
1 file changed