sh: unify sh2/sh3/sh4 linker scripts

The linker scripts of sh2/sh3/sh4 are almost the same.
The difference among them is essentially only one line.

They can be consolidated into a single file, arch/sh/cpu/u-boot.lds
by re-writing the diffrent line as follows:

	KEEP(*/start.o	(.text))

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/sh/cpu/sh2/u-boot.lds

@@ -1,76 +0,0 @@
-/*
- * Copyright (C) 2008 Nobuhiro Iwamatsu
- * Copyright (C) 2008 Renesas Solutions Corp.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux")
-OUTPUT_ARCH(sh)
-ENTRY(_start)
-
-SECTIONS
-{
-	/*
-	 * entry and reloct_dst will be provided via ldflags
-	 */
-	. = .;
-
-	PROVIDE (_ftext = .);
-	PROVIDE (_fcode = .);
-	PROVIDE (_start = .);
-
-	.text :
-	{
-		KEEP(arch/sh/cpu/sh2/start.o	(.text))
-		. = ALIGN(8192);
-		common/env_embedded.o	(.ppcenv)
-		. = ALIGN(8192);
-		common/env_embedded.o	(.ppcenvr)
-		. = ALIGN(8192);
-		*(.text)
-		. = ALIGN(4);
-	} =0xFF
-	PROVIDE (_ecode = .);
-	.rodata :
-	{
-		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
-		. = ALIGN(4);
-	}
-	PROVIDE (_etext = .);
-
-
-	PROVIDE (_fdata = .);
-	.data :
-	{
-		*(.data)
-		. = ALIGN(4);
-	}
-	PROVIDE (_edata = .);
-
-	PROVIDE (_fgot = .);
-	.got :
-	{
-		*(.got)
-		. = ALIGN(4);
-	}
-	PROVIDE (_egot = .);
-
-
-	.u_boot_list : {
-		KEEP(*(SORT(.u_boot_list*)));
-	}
-
-	PROVIDE (reloc_dst_end = .);
-
-	PROVIDE (bss_start = .);
-	PROVIDE (__bss_start = .);
-	.bss :
-	{
-		*(.bss)
-		. = ALIGN(4);
-	}
-	PROVIDE (bss_end = .);
-
-	PROVIDE (__bss_end = .);
-}

arch/sh/cpu/sh4/u-boot.lds

@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2007
- * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
- *
- * Copyright (C) 2008-2009
- * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-OUTPUT_FORMAT("elf32-sh-linux", "elf32-sh-linux", "elf32-sh-linux")
-OUTPUT_ARCH(sh)
-ENTRY(_start)
-
-SECTIONS
-{
-	/*
-	 * entry and reloct_dst will be provided via ldflags
-	 */
-	. = .;
-
-	PROVIDE (_ftext = .);
-	PROVIDE (_fcode = .);
-	PROVIDE (_start = .);
-
-	.text :
-	{
-		KEEP(arch/sh/cpu/sh4/start.o		(.text))
-		. = ALIGN(8192);
-		common/env_embedded.o	(.ppcenv)
-		. = ALIGN(8192);
-		common/env_embedded.o	(.ppcenvr)
-		. = ALIGN(8192);
-		*(.text)
-		. = ALIGN(4);
-	} =0xFF
-	PROVIDE (_ecode = .);
-	.rodata :
-	{
-		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
-		. = ALIGN(4);
-	}
-	PROVIDE (_etext = .);
-
-
-	PROVIDE (_fdata = .);
-	.data :
-	{
-		*(.data)
-		. = ALIGN(4);
-	}
-	PROVIDE (_edata = .);
-
-	PROVIDE (_fgot = .);
-	.got :
-	{
-		*(.got)
-		. = ALIGN(4);
-	}
-	PROVIDE (_egot = .);
-
-
-	.u_boot_list : {
-		KEEP(*(SORT(.u_boot_list*)));
-	}
-
-	PROVIDE (reloc_dst_end = .);
-	/* _reloc_dst_end = .; */
-
-	PROVIDE (bss_start = .);
-	PROVIDE (__bss_start = .);
-	.bss (NOLOAD) :
-	{
-		*(.bss)
-		. = ALIGN(4);
-	}
-	PROVIDE (bss_end = .);
-
-	PROVIDE (__bss_end = .);
-}

arch/sh/cpu/u-boot.lds

@@ -1,10 +1,10 @@
 /*
  * Copyright (C) 2007
- * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
- *
- * Copyright (C) 2007
  * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
  *
+ * Copyright (C) 2008-2009
+ * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ *
  * Copyright (C) 2008
  * Mark Jonas <mark.jonas@de.bosch.com>
  *
@@ -28,7 +28,7 @@ SECTIONS
 
 	.text :
 	{
-		KEEP(arch/sh/cpu/sh3/start.o	(.text))
+		KEEP(*/start.o		(.text))
 		. = ALIGN(8192);
 		common/env_embedded.o	(.ppcenv)
 		. = ALIGN(8192);