s390/zcrypt: externalize AP queue interrupt control
KVM has a need to control the interrupts on real and virtualized AP queue devices. This fix provides a new function to control the interrupt facilities of an AP queue device. Signed-off-by: NHarald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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