i5100_edac: convert to use simple_open()

This removes an open coded simple_open() function and
replaces file operations references to the function
with simple_open() instead.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index 6ed11b1..1b63517 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -961,14 +961,8 @@
 	return count;
 }
 
-static int inject_enable_open(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
 static const struct file_operations i5100_inject_enable_fops = {
-	.open = inject_enable_open,
+	.open = simple_open,
 	.write = inject_enable_write,
 	.llseek = generic_file_llseek,
 };