microblaze: Set script_offset_nor env variable

Set script_offset_nor env variable using CONFIG_BOOT_SCRIPT_OFFSET
and nor flash start address to keep bootscript offset configurable.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/microblaze-generic/microblaze-generic.c b/board/xilinx/microblaze-generic/microblaze-generic.c
index e590999..d4095c0 100644
--- a/board/xilinx/microblaze-generic/microblaze-generic.c
+++ b/board/xilinx/microblaze-generic/microblaze-generic.c
@@ -67,7 +67,10 @@
 
 	status |= env_set_hex("ramdisk_addr_r",
 			       gd->ram_base + SZ_32M + SZ_4M + SZ_2M);
-
+	if (IS_ENABLED(CONFIG_MTD_NOR_FLASH))
+		status |= env_set_hex("script_offset_nor",
+				       gd->bd->bi_flashstart +
+				       CONFIG_BOOT_SCRIPT_OFFSET);
 	if (status)
 		printf("%s: Saving run time variables FAILED\n", __func__);