zynq: Use GPLed files for SPL

The latest Xilinx tools generate ps7_init files that are explicitly
available under GPL. Change the makefile to allow drop in of those files
for building the SPL.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Reviewed-and-tested-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/zynq/.gitignore

 ps7_init.[ch]
+ps7_init_gpl.[ch]

board/xilinx/zynq/Makefile

@@ -7,9 +7,11 @@
 
 obj-y	:= board.o
 
-# Please copy ps7_init.c/h from hw project to this directory
+# Please copy ps7_init_gpl.c/h from hw project to this directory
 obj-$(CONFIG_SPL_BUILD) += \
-		$(if $(wildcard $(srctree)/$(src)/ps7_init.c), ps7_init.o)
+		$(if $(wildcard $(srctree)/$(src)/ps7_init_gpl.c), ps7_init_gpl.o, \
+			$(if $(wildcard $(srctree)/$(src)/ps7_init.c), ps7_init.o legacy.o))
 
 # Suppress "warning: function declaration isn't a prototype"
+CFLAGS_REMOVE_ps7_init_gpl.o := -Wstrict-prototypes
 CFLAGS_REMOVE_ps7_init.o := -Wstrict-prototypes

board/xilinx/zynq/legacy.c

+
+#warning usage of ps7_init files is deprecated please use ps7_init_gpl

board/xilinx/zynq/xil_io.h

@@ -6,7 +6,7 @@
 #define XIL_IO_H
 
 /*
- * This empty file is here because ps7_init.c exported by hw project
+ * This empty file is here because ps7_init_gpl.c exported by hw project
  * has #include "xil_io.h" line.
  */