Winbond W83627HF: Use existing functions instead of open-coding.

Winbond W83627HF: Use existing functions instead of open-coding.

Use w83627hf_set_clksel_48() where needed instead or open-coding the same
functionality, and also use w83627hf_enable_serial() instead of
w83627hf_enable_dev() (which does exactly the same, but isn't wrapped in the
enter/exit config mode functions).

Abuild-tested.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6143 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1