ALSA: ice1712: remove redundant assignment to new

The variable new is initialized with a value but it is never read. It is
being re-assigned a new value in every case path in the following switch
statement. The assignment is redundant and can be removed.

Cleans up clang scan build warning:
sound/pci/ice1712/quartet.c:569:8: warning: Although the value stored
to 'new' is used in the enclosing expression, the value is never actually
read from 'new' [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220805120439.2341600-1-colin.i.king@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: ColinIanKing

sound/pci/ice1712/quartet.c

@@ -566,7 +566,7 @@ static int qtet_ain12_sw_put(struct snd_kcontrol *kcontrol,
 {
 	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
 	unsigned int old, new, tmp, masked_old;
-	old = new = get_scr(ice);
+	old = get_scr(ice);
 	masked_old = old & (SCR_AIN12_SEL1 | SCR_AIN12_SEL0);
 	tmp = ucontrol->value.integer.value[0];
 	if (tmp == 2)