ARM: uniphier: allow to enable multiple SoCs

Before this commit, the Kconfig menu in mach-uniphier only allowed us
to choose one SoC to be compiled.  Each SoC has its own defconfig file
for the build-test coverage.  Consequently, some defconfig files are
duplicated with only the difference in CONFIG_DEFAULT_DEVICE_TREE and
CONFIG_{SOC_NAME}=y.

Now, most of board-specific parameters have been moved to device trees,
so it makes sense to include init code of multiple SoCs into a single
image as long as the SoCs have similar architecture.  In fact, some
SoCs of UniPhier family are very similar:
 - PH1-LD4 and PH1-sLD8
 - PH1-LD6b and ProXstream2 (will be added in the upcoming commit)

This commit will be helpful to merge some defconfig files for better
maintainability.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/include/mach/boot-device.h b/arch/arm/mach-uniphier/include/mach/boot-device.h
index 7a10f1c..eddb25f 100644
--- a/arch/arm/mach-uniphier/include/mach/boot-device.h
+++ b/arch/arm/mach-uniphier/include/mach/boot-device.h
@@ -1,6 +1,5 @@
 /*
- * Copyright (C) 2011-2014 Panasonic Corporation
- *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -8,13 +7,15 @@
 #ifndef _ASM_BOOT_DEVICE_H_
 #define _ASM_BOOT_DEVICE_H_
 
-int get_boot_mode_sel(void);
-
 struct boot_device_info {
 	u32 type;
 	char *info;
 };
 
-extern struct boot_device_info boot_device_table[];
+u32 ph1_sld3_boot_device(void);
+u32 ph1_ld4_boot_device(void);
+
+void ph1_sld3_boot_mode_show(void);
+void ph1_ld4_boot_mode_show(void);
 
 #endif /* _ASM_BOOT_DEVICE_H_ */