uniphier: Use generic console_t data structure

Since now the generic console_t structure holds the UART base address as
well, let's use that generic location and drop the UART driver specific
data structure at all.

Change-Id: Ia9d996bb45ff3a7f1b240f12fd75805b48a048e9
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
2 files changed