ASoC: wm8960: the enum of "DAC Polarity" should be wm8960_enum[1]

[ Upstream commit a077e81ec61e07a7f86997d045109f06719fbffe ]

the enum of "DAC Polarity" should be wm8960_enum[1].

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>