Blackfin: drop now unused local variable

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/lib/board.c b/arch/blackfin/lib/board.c
index a70473c..e3ee4cd 100644
--- a/arch/blackfin/lib/board.c
+++ b/arch/blackfin/lib/board.c
@@ -308,7 +308,6 @@
 
 void board_init_r(gd_t * id, ulong dest_addr)
 {
-	char *s;
 	bd_t *bd;
 	gd = id;
 	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */