headers_check fix: linux/coda_psdev.h

fix the following 'make headers_check' warning:

  usr/include/linux/coda_psdev.h:90: extern's make no sense in userspace
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>

include/linux/coda_psdev.h

@@ -24,7 +24,7 @@ static inline struct venus_comm *coda_vcp(struct super_block *sb)
 	return (struct venus_comm *)((sb)->s_fs_info);
 }
 
-
+#ifdef __KERNEL__
 /* upcalls */
 int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
 int venus_getattr(struct super_block *sb, struct CodaFid *fid,
@@ -64,6 +64,12 @@ int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
 int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
 
+/*
+ * Statistics
+ */
+
+extern struct venus_comm coda_comms[];
+#endif /* __KERNEL__ */
 
 /* messages between coda filesystem in kernel and Venus */
 struct upc_req {
@@ -82,11 +88,4 @@ struct upc_req {
 #define REQ_WRITE  0x4
 #define REQ_ABORT  0x8
 
-
-/*
- * Statistics
- */
-
-extern struct venus_comm coda_comms[];
-
 #endif