ARM: imx_v6_v7_defconfig: Enable GPIO_74X164

imx7d-sabresd board uses a 74LV595PW SPI expander to drive several
peripherals, such as Ethernet reset, PCI reset, LCD power, etc.

Enabled this option by default.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -200,6 +200,7 @@ CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_MC9S08DZ60=y
 CONFIG_GPIO_PCA953X=y
 CONFIG_GPIO_STMPE=y
+CONFIG_GPIO_74X164=y
 CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_IMX=y
 CONFIG_POWER_RESET_SYSCON=y