mfd: mc13xxx-core: Fix memory leak in mc13xxx_add_subdevice_pdata()

The memory allocated for cell.name using kmemdup() is not freed when
mfd_add_devices() fails. Fix that by using devm_kmemdup().

Fixes: 8e00593 ("mfd: Add mc13892 support to mc13xxx")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Link: https://patch.msgid.link/20260120102622.66921-1-nihaal@cse.iitm.ac.in
Signed-off-by: Lee Jones <lee@kernel.org>

Author: Abdun Nihaal

drivers/mfd/mc13xxx-core.c

@@ -377,7 +377,7 @@ static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
 	if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
 		return -E2BIG;
 
-	cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
+	cell.name = devm_kmemdup(mc13xxx->dev, buf, strlen(buf) + 1, GFP_KERNEL);
 	if (!cell.name)
 		return -ENOMEM;