ARM: imx_v6_v7_defconfig: Enable CONFIG_MXC_IPU and CONFIG_MXC_IPU_PRE

This patch sets CONFIG_MXC_IPU and CONFIG_MXC_IPU_PRE to y so that we
can build in IPUv3 common driver and IPUv3 prefetch drivers.

Signed-off-by: Liu Ying <victor.liu@nxp.com>

arch/arm/configs/imx_v6_v7_defconfig

@@ -457,6 +457,8 @@ CONFIG_OPTEE=y
 CONFIG_MUX_MMIO=y
 CONFIG_SIOX=m
 CONFIG_SIOX_BUS_GPIO=m
+CONFIG_MXC_IPU=y
+CONFIG_MXC_IPU_V3_PRE=y
 CONFIG_MXC_MLB150=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y