lib: export bitrev16

Bluetooth will be able to use this.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Dave Young <hidave.darkstar@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h
index 05e540d..7ffe03f 100644
--- a/include/linux/bitrev.h
+++ b/include/linux/bitrev.h
@@ -10,6 +10,7 @@
 	return byte_rev_table[byte];
 }
 
+extern u16 bitrev16(u16 in);
 extern u32 bitrev32(u32 in);
 
 #endif /* _LINUX_BITREV_H */