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/pgtable.h b/include/asm-frv/pgtable.h
index 147e995..3c402af 100644
--- a/include/asm-frv/pgtable.h
+++ b/include/asm-frv/pgtable.h
@@ -93,7 +93,7 @@
 
 /*
  * we use 2-level page tables, folding the PMD (mid-level table) into the PGE (top-level entry)
- * [see Documentation/fujitsu/frv/mmu-layout.txt]
+ * [see Documentation/frv/mmu-layout.txt]
  *
  * Page Directory:
  *  - Size: 16KB