fdt: suppress unused variable 'bd' warning

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

common/fdt_support.c

@@ -46,7 +46,6 @@ struct fdt_header *fdt;
 
 int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
 {
-	bd_t *bd = gd->bd;
 	int   nodeoffset;
 	int   err;
 	u32   tmp;		/* used to set 32 bit integer properties */