efi: smbios: Drop support for SMBIOS2 tables

Only the v3 table is supported now, so always use this when installing
the EFI table.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 5cbce6d..5db342e 100644
--- a/lib/efi_loader/efi_smbios.c
+++ b/lib/efi_loader/efi_smbios.c
@@ -27,7 +27,6 @@
  */
 efi_status_t efi_smbios_register(void)
 {
-	const efi_guid_t *guid;
 	ulong addr;
 	efi_status_t ret;
 	void *buf;
@@ -47,8 +46,7 @@
 
 	/* Install SMBIOS information as configuration table */
 	buf = map_sysmem(addr, 0);
-	guid = !memcmp(buf, "_SM_", 4) ? &smbios_guid : &smbios3_guid;
-	ret = efi_install_configuration_table(guid, buf);
+	ret = efi_install_configuration_table(&smbios3_guid, buf);
 	unmap_sysmem(buf);
 
 	return ret;