ARM: imx_v6_v7_defconfig: Enable FSL_LPUART support

Enable the FSL_LPUART driver as it is used by the VF610 family.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -133,6 +133,8 @@ CONFIG_VT_HW_CONSOLE_BINDING=y
 # CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_IMX=y
 CONFIG_SERIAL_IMX_CONSOLE=y
+CONFIG_SERIAL_FSL_LPUART=y
+CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_MXC_RNGA=y
 CONFIG_I2C=y