NAND erase was not happening for size 1GiB or more. Erase
command was executing successfully but in actual, it was not
erasing.
This patch fixed erase issue for 1 GiB or more size nand.
Signed-off-by: Vipul Kumar <vipulk@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>