efi/esrt: use memunmap rather kfree to free the remapping

[Pan Bian]

The remapping result of memremap should be freed with memunmap, not
kfree.

Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
---
 drivers/firmware/efi/esrt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
index bd7ed3c..3ef7001 100644
--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -431,7 +431,7 @@ static int __init esrt_sysfs_init(void)
 err_remove_esrt:
 	kobject_put(esrt_kobj);
 err:
-	kfree(esrt);
+	memunmap(esrt);
 	esrt = NULL;
 	return error;
 }
-- 
1.9.1