fix(versal-net): build time address and size param

For Versal NET platfrom, to provide the base address location and
size of bl31, at build time, VERSAL_NET_ATF_MEM_BASE and
VERSAL_NET_ATF_MEM_SIZEi are used, respectively.
Update the same in the script.

Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Change-Id: Id0c6555222ee37933bdbe59c70c35847cbb0fcde
diff --git a/tf_config/versal_net-ddr b/tf_config/versal_net-ddr
index 48c64df..594383b 100644
--- a/tf_config/versal_net-ddr
+++ b/tf_config/versal_net-ddr
@@ -1,6 +1,6 @@
 CROSS_COMPILE=aarch64-none-elf-
 PLAT=versal_net
 RESET_TO_BL31=1
-VERSAL_ATF_MEM_BASE=0x70000000
-VERSAL_ATF_MEM_SIZE=0x80000
+VERSAL_NET_ATF_MEM_BASE=0x70000000
+VERSAL_NET_ATF_MEM_SIZE=0x80000
 XILINX_OF_BOARD_DTB_ADDR=0x1000