[S390] extint: get rid of early code plus cleanup

Get rid of register/unregister_early_external_interrupt() and clean up
the code while at it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2 files changed