hdspm_set_system_clock_mode() is almost a one-by-one copy of
hdspm_set_toggle_setting(). To improve code quality, remove the
duplication.
Signed-off-by: NAdrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>