ALSA: timer: minimize open-coded access to hw.resolution

Some info-querying code still used hw.resolution directly instead of
calling snd_timer_hw_resolution(), thus missing a possible
hw.c_resolution callback. This patch rectifies that.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230612191325.1315854-7-oswald.buddenhagen@gmx.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>