universal_c210: check the NULL pointer when get the PMIC

PMIC 2.0 require to test return pointer from pmic_get()

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>

board/samsung/universal_c210/universal.c

@@ -343,6 +343,9 @@ static void init_pmic_lcd(void)
 
 	struct pmic *p = pmic_get("MAX8998_PMIC");
 
+	if (!p)
+		return;
+
 	if (pmic_probe(p))
 		return;
 
@@ -434,6 +437,9 @@ static void lcd_power_on(void)
 {
 	struct pmic *p = pmic_get("MAX8998_PMIC");
 
+	if (!p)
+		return;
+
 	if (pmic_probe(p))
 		return;