arch/ppc64: Remove .id section in bootblock

The strings in .id are expected to match the build for
the purpose of identifying the binary image. There is
no identified use for the offsets.

The files id.ld and prologue.inc were unused.

Change-Id: Ida332671e0ace3f6afd11020474ffda04614bad5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47966
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/arch/ppc64/Kconfig

@@ -17,7 +17,3 @@ config ARCH_ROMSTAGE_PPC64
 config ARCH_RAMSTAGE_PPC64
 	bool
 	select ARCH_PPC64
-
-config ID_SECTION_OFFSET
-	hex
-	default 0x80

src/arch/ppc64/bootblock.S

@@ -8,26 +8,3 @@
 .org 0x100, 0xff
 _start:
 	b _start
-	.section ".id", "a", %progbits
-
-	.section ".id", "a", @progbits
-
-	.globl __id_start
-__id_start:
-ver:
-	.asciz "4" //COREBOOT_VERSION
-vendor:
-	.asciz "qemu" //CONFIG_MAINBOARD_VENDOR
-part:
-	.asciz "1" //CONFIG_MAINBOARD_PART_NUMBER
-	/* Reverse offset to the vendor id */
-.long __id_end + CONFIG_ID_SECTION_OFFSET - ver
-	/* Reverse offset to the vendor id */
-.long __id_end + CONFIG_ID_SECTION_OFFSET - vendor
-	/* Reverse offset to the part number */
-.long __id_end + CONFIG_ID_SECTION_OFFSET - part
-	/* of this romimage */
-.long CONFIG_ROM_SIZE
-	.globl __id_end
-
-__id_end:

src/arch/ppc64/id.ld

@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-SECTIONS {
-	. = (0xffffffff - CONFIG_ID_SECTION_OFFSET) - (__id_end - __id_start) + 1;
-	.id (.): {
-		*(.id)
-	}
-}

src/arch/ppc64/prologue.inc

@@ -1,4 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-.section ".rom.data", "a", @progbits
-.section ".rom.text", "ax", @progbits