arm: zynq: Move ps7_* to separate file

Extract ps7_* from spl code to prepare for extension.
And also return value.

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

arch/arm/mach-zynq/Makefile

@@ -15,4 +15,4 @@ obj-y	+= slcr.o
 obj-y	+= clk.o
 obj-y	+= lowlevel_init.o
 AFLAGS_lowlevel_init.o := -mfpu=neon
-obj-$(CONFIG_SPL_BUILD)	+= spl.o
+obj-$(CONFIG_SPL_BUILD)	+= spl.o ps7_spl_init.o

arch/arm/mach-zynq/include/mach/ps7_init_gpl.h

@@ -0,0 +1,14 @@
+/*
+ * (c) Copyright 2010-2017 Xilinx, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_PS7_INIT_GPL_H
+#define _ASM_ARCH_PS7_INIT_GPL_H
+
+/* Called by spl.c */
+int ps7_init(void);
+int ps7_post_config(void);
+
+#endif /* _ASM_ARCH_PS7_INIT_GPL_H */

arch/arm/mach-zynq/include/mach/sys_proto.h

@@ -20,8 +20,4 @@ extern unsigned int zynq_get_silicon_version(void);
 
 int zynq_board_read_rom_ethaddr(unsigned char *ethaddr);
 
-/* Driver extern functions */
-extern void ps7_init(void);
-int ps7_post_config(void);
-
 #endif /* _SYS_PROTO_H_ */

arch/arm/mach-zynq/ps7_spl_init.c

@@ -0,0 +1,27 @@
+/*
+ * (c) Copyright 2010-2017 Xilinx, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <asm/spl.h>
+#include <asm/arch/ps7_init_gpl.h>
+
+__weak int ps7_init(void)
+{
+	/*
+	 * This function is overridden by the one in
+	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
+	 */
+	return 0;
+}
+
+__weak int ps7_post_config(void)
+{
+	/*
+	 * This function is overridden by the one in
+	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
+	 */
+	return 0;
+}

arch/arm/mach-zynq/spl.c

@@ -11,6 +11,7 @@
 #include <asm/spl.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/ps7_init_gpl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -83,23 +84,6 @@ int spl_start_uboot(void)
 }
 #endif
 
-__weak void ps7_init(void)
-{
-	/*
-	 * This function is overridden by the one in
-	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
-	 */
-}
-
-__weak int ps7_post_config(void)
-{
-	/*
-	 * This function is overridden by the one in
-	 * board/xilinx/zynq/(platform)/ps7_init_gpl.c, if it exists.
-	 */
-	return 0;
-}
-
 void spl_board_prepare_for_boot(void)
 {
 	ps7_post_config();