hwclock: remove referal to deprecated keyboard interface

The KDGHWCLK has been gone quite a while.

Reference: http://marc.info/?l=linux-kernel&m=104171103925897
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
setarch: reindent code

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
setarch: use personality() system call when it is available

Signed-off-by: Sami Kerola <kerolasa@iki.fi>