move frv docs one level up

My first guess for "fujitsu" was it might be related to the
fujitsu-laptop.c driver...

Move the frv directory one level up since frv is the name of the
architecture in the Linux kernel.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/include/asm-frv/highmem.h b/include/asm-frv/highmem.h
index ff4d6cd..26cefcd 100644
--- a/include/asm-frv/highmem.h
+++ b/include/asm-frv/highmem.h
@@ -4,7 +4,7 @@
  * Written by David Howells (dhowells@redhat.com)
  * - Derived from include/asm-i386/highmem.h
  *
- * See Documentation/fujitsu/frv/mmu-layout.txt for more information.
+ * See Documentation/frv/mmu-layout.txt for more information.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License