scsi: pm80xx: Do not sleep in atomic context

hw_event_sas_phy_up() is used in hardirq/softirq context:

 pm8001_interrupt_handler_msix() || pm8001_interrupt_handler_intx() || pm8001_tasklet
   => PM8001_CHIP_DISP->isr() = pm80xx_chip_isr()
     => process_oq() [spin_lock_irqsave(&pm8001_ha->lock,)]
       => process_one_iomb()
         => mpi_hw_event()
           => hw_event_sas_phy_up()
             => msleep(200)

Revert the msleep() back to an mdelay() to avoid sleeping in atomic
context.

Link: https://lore.kernel.org/r/[email protected]
Fixes: 4daf1ef3c681 ("scsi: pm80xx: Convert 'long' mdelay to msleep")
Cc: Vikram Auradkar <[email protected]>
Cc: Jack Wang <[email protected]>
Acked-by: Jack Wang <[email protected]>
Signed-off-by: Ahmed S. Darwish <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

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