mips: Fix baudrate divisor computation on alchemy cpus

Use CFG_MIPS_TIMER_FREQ when computing the baudrate divisor
on alchemy cpus.

Signed-off-by: Wolfgang Ocker <weo@reccoware.de>
Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
1 file changed