xilinx: common: Get rid of initrd_high variable setup

When bootm_low/bootm_size are setup properly there is no need to setup any
initrd_high address. Location for initrd is determined through LMB.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
index 0782d08..901591b 100644
--- a/board/xilinx/common/board.c
+++ b/board/xilinx/common/board.c
@@ -77,14 +77,8 @@
 
 int board_late_init_xilinx(void)
 {
-	ulong initrd_hi;
-
 	env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
 
-	initrd_hi = gd->start_addr_sp - CONFIG_STACK_SIZE;
-	initrd_hi = round_down(initrd_hi, SZ_16M);
-	env_set_addr("initrd_high", (void *)initrd_hi);
-
 	env_set_addr("bootm_low", (void *)gd->ram_base);
 	env_set_addr("bootm_size", (void *)gd->ram_size);