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/internal.h b/fs/proc/internal.h
index 3bfb7b8..d5bf4de 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -66,7 +66,7 @@
 
 void free_proc_entry(struct proc_dir_entry *de);
 
-int proc_init_inodecache(void);
+void proc_init_inodecache(void);
 
 static inline struct pid *proc_pid(struct inode *inode)
 {