scsi: efct: Use IRQF_ONESHOT and default primary handler

scsi: efct: Use IRQF_ONESHOT and default primary handler

There is no added value in efct_intr_msix() compared to
irq_default_primary_handler().

Using a threaded interrupt without a dedicated primary handler mandates
the IRQF_ONESHOT flag to mask the interrupt source while the threaded
handler is active. Otherwise the interrupt can fire again before the
threaded handler had a chance to run.

Use the default primary interrupt handler by specifying NULL and set
IRQF_ONESHOT so the interrupt source is masked until the secondary
handler is done.

Fixes: 4df84e8466242 ("scsi: elx: efct: Driver initialization routines")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260128095540.863589-8-bigeasy@linutronix.de