ALSA: emu10k1: remove pointless locks from timer code

Contrary to its name, reg_lock locks the emu data structure, not the
registers. As the functions access only data which is set once at card
initialization, there is no point in locking it.

Actually locking the registers would be pointless as well, as
snd_emu10k1_intr_{en,dis}able() does its own locking, and TIMER is
accessed only in this one place.

Locking snd_emu10k1_timer_{start,stop}() against each other also
wouldn't buy us anything; the functions interleaving their I/O accesses
wouldn't introduce new problems.

Signed-off-by: Oswald Buddenhagen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

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