Do EFI partitions only on ia64.

Yes, they might be useful somewhere else too, but the EFI
discovery code is so fragile that it's not worth the bother.

EFI people informed.

fs/partitions/Kconfig

@@ -219,7 +219,7 @@ config SUN_PARTITION
 
 config EFI_PARTITION
 	bool "EFI GUID Partition support"
-	depends on PARTITION_ADVANCED
+	depends on PARTITION_ADVANCED && IA64
 	select CRC32
 	help
 	  Say Y here if you would like to use hard disks under Linux which