arm1176: fix relocation

Fix relocation code for arm1176, do it like other ARM
CPU's are doing.
Tested only with CONFIG_SKIP_RELOCATE_UBOOT defined
and using nand_spl (booting from nand). Test done on
s3c6410 based board (not yet supported in main line).

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>