ARM: uniphier: fix delay fixup code in LD11 UMC init

The ddrphy_shift_rof_hws() never writes back the shifted delay value
to the register, which makes this function non-effective.

Signed-off-by: Kotaro Hayashi <hayashi.kotaro@socionext.com>
[masahiro: add git log]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>