ALSA: emu10k1: remove apparently pointless FPGA reads

These seem to be simply cargo-culted from the Windows driver's behavior.
However, the original reason were presumably read-modify-write cycles,
which we don't do.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230421141006.1005539-5-oswald.buddenhagen@gmx.de


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