mips: Move cpu/mips/* to arch/mips/cpu/*

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/gth2/gth2.c b/board/gth2/gth2.c
index 59873d5..8c3b55a 100644
--- a/board/gth2/gth2.c
+++ b/board/gth2/gth2.c
@@ -93,7 +93,7 @@
 	return (SDRAM_SIZE);
 }
 
-/* In cpu/mips/cpu.c */
+/* In arch/mips/cpu/cpu.c */
 void write_one_tlb( int index, u32 pagemask, u32 hi, u32 low0, u32 low1 );
 
 void set_ledcard(u32 value){