mfd: ti_am335x_tscadc: Update reg_cache variable in clr function

The reg_cache variable should be updated with current
steps in the reg_se register. Then the mask should
apply and clear the register. Previously, the reg_cache
can be an old redundant value that isn't updated.
Signed-off-by: NZubair Lutfullah <zubair.lutfullah@gmail.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

drivers/mfd/ti_am335x_tscadc.c

@@ -67,10 +67,10 @@ EXPORT_SYMBOL_GPL(am335x_tsc_se_set);
 void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val)
 {
 	spin_lock(&tsadc->reg_lock);
+	tsadc->reg_se_cache = tscadc_readl(tsadc, REG_SE);
 	tsadc->reg_se_cache &= ~val;
-	spin_unlock(&tsadc->reg_lock);
-
 	am335x_tsc_se_update(tsadc);
+	spin_unlock(&tsadc->reg_lock);
 }
 EXPORT_SYMBOL_GPL(am335x_tsc_se_clr);