arm: ls102xa: Adjust the load address of U-Boot for NOR boot

The original load address of U-Boot is 0x67f80000. The address
space of NOR flash is 0x60000000 to 0x67ffffff. It will cause
the size of u-boot couldn't be larger than 512K. As more features
are supported in u-boot, the size of u-boot is larger than 512K.

To fix this issue, the load address of U-Boot for NOR boot is
adjusted to 0x60100000.

In RCW, the PBI command needs to change as follows:
 .pbi
-write 0xee0200, 0x67f80000
+write 0xee0200, 0x60100000
 .end

Signed-off-by: Alison Wang <alison.wang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>