powerpc/85xx: p1025twr: add module conditional to fix QE-uart issue

A ioport setting was needed when used the QE uart function on TWR-P1025.
Added a conditional definition to avoid missing this setting when the
QE-uart driver was bulit to a module.

Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Signed-off-by: Li Pengbo <Pengbo.Li@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>