arm64: versal: Let U-Boot to update memory node by default

There is no reason not to let U-Boot to update memory node by default. In
past this was disabled by purpose to be able to test different memory
configurations from one U-Boot instance.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index 4ed14f7..a307702 100644
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -7,7 +7,6 @@
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
-# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
 CONFIG_BOOTDELAY=5
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y