board/amirix/ap1000/flash.c: Fix GCC 4.6 build warning

Fix:
flash.c: In function 'flash_write_cfiword':
flash.c:778:11: warning: variable 'ctladdr' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Marek Vasut <marek.vasut@gmail.com>

board/amirix/ap1000/flash.c

@@ -774,12 +774,9 @@ static ulong flash_get_size (ulong base, int banknum)
 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 				cfiword_t cword)
 {
-
-	cfiptr_t ctladdr;
 	cfiptr_t cptr;
 	int flag;
 
-	ctladdr.cp = flash_make_addr (info, 0, 0);
 	cptr.cp = (uchar *) dest;
 
 	/* Check if Flash is (sufficiently) erased */