fix(allwinner): remove unneeded header inclusion

Nothing in sunxi_bl31_setup.c uses any functionality provided by the
fdt_wrappers file, so remove its inclusion from the header list.

Change-Id: I47031a58add2f85e757e75d8578f4e8e21ef65ea
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/allwinner/common/sunxi_bl31_setup.c b/plat/allwinner/common/sunxi_bl31_setup.c
index 24edd79..263083b 100644
--- a/plat/allwinner/common/sunxi_bl31_setup.c
+++ b/plat/allwinner/common/sunxi_bl31_setup.c
@@ -14,7 +14,6 @@
 #include <arch_helpers.h>
 #include <common/debug.h>
 #include <common/fdt_fixup.h>
-#include <common/fdt_wrappers.h>
 #include <drivers/arm/gicv2.h>
 #include <drivers/console.h>
 #include <drivers/generic_delay_timer.h>