allwinner: Pass FDT address to sunxi_pmic_setup()

For Allwinner boards we now use some heuritistics to find a preloaded
.dtb file.

Pass this address on to the PMIC setup routine, so that it can use the
information contained therein to setup some initial power rails.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/allwinner/sun50i_a64/sunxi_power.c b/plat/allwinner/sun50i_a64/sunxi_power.c
index eaca0af..48d01d0 100644
--- a/plat/allwinner/sun50i_a64/sunxi_power.c
+++ b/plat/allwinner/sun50i_a64/sunxi_power.c
@@ -126,7 +126,7 @@
 	return rsb_write(AXP803_RT_ADDR, reg, regval);
 }
 
-int sunxi_pmic_setup(uint16_t socid)
+int sunxi_pmic_setup(uint16_t socid, const void *fdt)
 {
 	int ret;