mfd: pm8xxx-spk: Fix the disable logic for pmic speaker driver

The pmic spk driver is not getting disabled due to wrong disble
logic.This results in spk driver always on.

CRs-Fixed: 376950
Change-Id: Ia1509f97ae1a3526732218492ff86063afe68137
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>
diff --git a/drivers/mfd/pm8xxx-spk.c b/drivers/mfd/pm8xxx-spk.c
index 297ddfa..2de70f4 100644
--- a/drivers/mfd/pm8xxx-spk.c
+++ b/drivers/mfd/pm8xxx-spk.c
@@ -162,7 +162,10 @@
 	val = pm8xxx_spk_read(PM8XXX_SPK_CTL1_REG_OFF);
 	if (val < 0)
 		return val;
-	val |= (enable << 3);
+	if (enable)
+		val |= (1 << 3);
+	else
+		val &= ~(1 << 3);
 	ret = pm8xxx_spk_write(PM8XXX_SPK_CTL1_REG_OFF, val);
 	if (!ret)
 		ret = pm8xxx_spk_bank_write(addr, 6, PWM_EN_MASK);