imx: pmic: Set proper pmic name for iMX53 HSC|DDC boards

After the
commit 4213609cc7 ("drivers: core: use strcmp when find device by name")
the exact DTS node name for PMIC device must be provided.

This patch fixes this issue by providing full DTS node name ('mc34708@8').

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Jaehoon Chug <jh80.chung@samsung.com>

board/k+p/kp_imx53/kp_imx53.c

@@ -48,7 +48,7 @@ static int power_init(void)
 	struct udevice *dev;
 	int ret;
 
-	ret = pmic_get("mc34708", &dev);
+	ret = pmic_get("mc34708@8", &dev);
 	if (ret) {
 		printf("%s: mc34708 not found !\n", __func__);
 		return ret;