soc: samsung: Use kbasename instead of open coding

In preparation to not store the full path of nodes in full_name, use
kbasename instead as it will work either with the full path or not.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: linux-samsung-soc@vger.kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/soc/samsung/pm_domains.c

@@ -147,7 +147,7 @@ static __init const char *exynos_get_domain_name(struct device_node *node)
 	const char *name;
 
 	if (of_property_read_string(node, "label", &name) < 0)
-		name = strrchr(node->full_name, '/') + 1;
+		name = kbasename(node->full_name);
 	return kstrdup_const(name, GFP_KERNEL);
 }