console: run uart_init() if device-specific UART is enabled

A recent patch (DROP: uart8250mem: Fix bugs in MMIO uart handling)
introduced a regression where boards with non-8250 serial UART
no longer run uart_init().

BUG=chrome-os-partner:41169
BRANCH=none
TEST=built and booted on Brain

Change-Id: If7f1266730c9f3da3af798e41a7202380215ee2a
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/276194
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
1 file changed