proc: proc_init_inodecache() can't fail

kmem_cache creation code will panic, don't return anything.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 9511753..2a3abd2 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -104,9 +104,9 @@
 
 void __init proc_root_init(void)
 {
-	int err = proc_init_inodecache();
-	if (err)
-		return;
+	int err;
+
+	proc_init_inodecache();
 	err = register_filesystem(&proc_fs_type);
 	if (err)
 		return;