x86: zimage: Remove acpi_rsdp_addr propagation to kernel boot parameters

As of today, the proposal of adding "acpi_rsdp_addr" to the kernel
boot protocol does not make its way to the kernel mainline. This
creates some confusion if we leave it in the U-Boot code base.
Remove it for now until we have a clear picture with kernel upstream.

Note this eventually does a partial revert to commit 3469bf4274
("x86: zImage: Propagate acpi_rsdp_addr to kernel via boot parameters")

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/include/asm/bootparam.h

@@ -69,7 +69,6 @@ struct setup_header {
 	__u64	pref_address;
 	__u32	init_size;
 	__u32	handover_offset;
-	__u64   acpi_rsdp_addr;
 } __attribute__((packed));
 
 struct sys_desc_table {

arch/x86/lib/zimage.c

@@ -287,11 +287,6 @@ int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 		hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
 #endif
 
-#ifdef CONFIG_GENERATE_ACPI_TABLE
-	if (bootproto >= 0x020e)
-		hdr->acpi_rsdp_addr = acpi_get_rsdp_addr();
-#endif
-
 	setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
 	setup_video(&setup_base->screen_info);