ARM: at91: pm: Add of_node_put() before goto

Fix following coccicheck warning:
./arch/arm/mach-at91/pm.c:643:1-33: WARNING: Function
for_each_matching_node_and_match should have of_node_put() before goto

Early exits from for_each_matching_node_and_match should decrement the
node reference counter.

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211014084555.21422-1-wanjiabing@vivo.com

Author: Wan Jiabing

arch/arm/mach-at91/pm.c

@@ -645,6 +645,7 @@ static __init int at91_dt_ramc(bool phy_mandatory)
 		if (!soc_pm.data.ramc[idx]) {
 			pr_err("unable to map ramc[%d] cpu registers\n", idx);
 			ret = -ENOMEM;
+			of_node_put(np);
 			goto unmap_ramc;
 		}
 
@@ -670,6 +671,7 @@ static __init int at91_dt_ramc(bool phy_mandatory)
 		if (!soc_pm.data.ramc_phy) {
 			pr_err("unable to map ramc phy cpu registers\n");
 			ret = -ENOMEM;
+			of_node_put(np);
 			goto unmap_ramc;
 		}
 	}