ALSA: emu10k1: minor optimizations

- In snd_emu10k1_look_for_ctl(), evaluate the cheap condition first
- In _snd_emu10k1_{audigy_,}init_efx(), don't use expensive bit setting
  loops to fill arrays
- In snd_emu_proc_ptr_reg_read(), remove useless condition - iobase can
  be only 0 or 0x20

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230422121519.1052813-1-oswald.buddenhagen@gmx.de


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