configs: am57xx_evm_defconfig: Enable LPAE mode

Enable Linear Physical Address Extension mode which is a
prerequisite for hypervisor mode.
Signed-off-by: NKeerthy <j-keerthy@ti.com>
Reviewed-by: NTom Rini <trini@konsulko.com>

configs/am57xx_evm_defconfig

@@ -4,6 +4,7 @@ CONFIG_OMAP54XX=y
 CONFIG_TARGET_AM57XX_EVM=y
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
 CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_ARMV7_LPAE=y
 CONFIG_SPL_STACK_R_ADDR=0x82000000
 CONFIG_DEFAULT_DEVICE_TREE="am57xx-beagle-x15"
 CONFIG_FIT=y