microblaze: Setup distro boot env variables at run time

Setup all the distro boot related environment variables at
run time. Add BOOT_SCRIPT_OFFSET config to microblaze board
Kconfig.

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 724c339..c1ae8fb 100644
--- a/board/xilinx/microblaze-generic/microblaze-generic.c
+++ b/board/xilinx/microblaze-generic/microblaze-generic.c
@@ -63,6 +63,20 @@
 				lowmem_size));
 	status |= env_set_addr("fdt_high", (void *)min_t(ulong, max_size,
 				lowmem_size));
+
+	status |= env_set_hex("scriptaddr", max_size + SZ_2M);
+
+	status |= env_set_hex("pxefile_addr_r", max_size + SZ_1M);
+
+	status |= env_set_hex("kernel_addr_r", gd->ram_base + SZ_32M);
+
+	status |= env_set_hex("fdt_addr_r", gd->ram_base + SZ_32M - SZ_1M);
+
+	status |= env_set_hex("ramdisk_addr_r",
+			       gd->ram_base + SZ_32M + SZ_4M + SZ_2M);
+
+	status |= env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
+
 	if (status)
 		printf("%s: Saving run time variables FAILED\n", __func__);