According to its documentation, type_register_static()'s TypeInfo
argument should exist for the life type of the type.
Therefore use type_register() when registering the list of CPU subtypes.
No functional change with the current implementation.
Cf. 918fd0839eeafc83bd4984364321a947d29041fe for arm.
Signed-off-by: Andreas Färber <afaerber@suse.de>