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/common/include/sunxi_private.h b/plat/allwinner/common/include/sunxi_private.h
index 6c9c509..a2d7c38 100644
--- a/plat/allwinner/common/include/sunxi_private.h
+++ b/plat/allwinner/common/include/sunxi_private.h
@@ -14,7 +14,7 @@
 void sunxi_disable_secondary_cpus(unsigned int primary_cpu);
 void __dead2 sunxi_power_down(void);
 
-int sunxi_pmic_setup(uint16_t socid);
+int sunxi_pmic_setup(uint16_t socid, const void *fdt);
 void sunxi_security_setup(void);
 
 uint16_t sunxi_read_soc_id(void);