ARM: at91: pm: do not initialize pdev

There is no need to initialize pdev.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-6-claudiu.beznea@microchip.com

arch/arm/mach-at91/pm.c

@@ -659,7 +659,7 @@ static int __init at91_pm_backup_init(void)
 {
 	struct gen_pool *sram_pool;
 	struct device_node *np;
-	struct platform_device *pdev = NULL;
+	struct platform_device *pdev;
 	int ret = -ENODEV;
 
 	if (!IS_ENABLED(CONFIG_SOC_SAMA5D2))