ARM64: zynqmp: Ignore warnings from autogenerated files

Autogenerated files contain casting issues and missing function
declaration and even usleep implementation. Suppress them for now
till these files are fixed.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/zynqmp/Makefile

@@ -27,3 +27,6 @@ CFLAGS_REMOVE_psu_init_gpl.o := -Wstrict-prototypes
 
 # To include xil_io.h
 CFLAGS_psu_init_gpl.o := -I$(srctree)/$(src)
+
+# To suppress "warning: cast to pointer from integer of different size"
+CFLAGS_psu_init_gpl.o += -Wno-int-to-pointer-cast

board/xilinx/zynqmp/xil_io.h

@@ -7,6 +7,7 @@
 
 /* FIXME remove this when vivado is fixed */
 #include <asm/io.h>
+#include <common.h>
 
 #define xil_printf(...)
 
@@ -32,4 +33,12 @@ int Xil_In32(unsigned long addr)
 	return readl(addr);
 }
 
+void mask_delay(u32 delay);
+void usleep(u32 sleep)
+{
+	udelay(sleep);
+}
+int mask_poll(u32 add, u32 mask);
+int mask_pollOnValue(u32 add, u32 mask, u32 value);
+
 #endif /* XIL_IO_H */