dm: pmic: Correct the pmic_reg_write() implementation

This should write the register, not read it. Fix this bug.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
diff --git a/drivers/power/pmic/pmic-uclass.c b/drivers/power/pmic/pmic-uclass.c
index d99cb9a..49709f3 100644
--- a/drivers/power/pmic/pmic-uclass.c
+++ b/drivers/power/pmic/pmic-uclass.c
@@ -142,7 +142,7 @@
 	u8 byte = value;
 
 	debug("%s: reg=%x, value=%x\n", __func__, reg, value);
-	return pmic_read(dev, reg, &byte, 1);
+	return pmic_write(dev, reg, &byte, 1);
 }
 
 int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)