powerpc/dts: Define '_end' symbol in mpc85xx U-Boot lds files

'board_fdt_blob_setup' function sets up fdt blob at '&_end' so
define '_end' symbol in mpc85xx lds files.

Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/powerpc/cpu/mpc85xx/u-boot-nand.lds

@@ -74,6 +74,7 @@ SECTIONS
   .data.init : { *(.data.init) }
   . = ALIGN(256);
   __init_end = .;
+  _end = .;
 
   .bootpg ADDR(.text) - 0x1000 :
   {

arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds

@@ -42,6 +42,7 @@ SECTIONS
 	. = ALIGN(8);
 	__init_begin = .;
 	__init_end = .;
+	_end = .;
 #if defined(CONFIG_FSL_IFC) /* Restrict bootpg at 4K boundry for IFC */
 	.bootpg ADDR(.text) + 0x1000 :
 	{

arch/powerpc/cpu/mpc85xx/u-boot-spl.lds

@@ -55,6 +55,7 @@ SECTIONS
 	. = ALIGN(8);
 	__init_begin = .;
 	__init_end = .;
+	_end = .;
 #ifdef CONFIG_SPL_SKIP_RELOCATE
 	. = ALIGN(4);
 	__bss_start = .;

arch/powerpc/cpu/mpc85xx/u-boot.lds

@@ -81,6 +81,7 @@ SECTIONS
   .data.init : { *(.data.init) }
   . = ALIGN(256);
   __init_end = .;
+  _end = .;
 
 #ifdef CONFIG_SYS_MPC85XX_NO_RESETVEC
   .bootpg ADDR(.text) - 0x1000 :