uniphier: fix base address of IO block buffer
uniphier: fix base address of IO block buffer

The current IO block buffer overlaps with BL2 image location.
So, BL2 may corrupt itself.

Signed-off-by: Masahiro Yamada <378b411a8a63ecc7605ec4272234862d7781c6ae@socionext.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware