scsi: pm80xx: Remove busy wait from mpi_uninit_check()

scsi: pm80xx: Remove busy wait from mpi_uninit_check()

mpi_uninit_check() is not being called in an atomic context.  The only
caller of mpi_uninit_check() is pm80xx_chip_soft_rst().

Callers of pm80xx_chip_soft_rst():

 - pm8001_ioctl_soft_reset()
 - pm8001_pci_probe()
 - pm8001_pci_remove()
 - pm8001_pci_suspend()
 - pm8001_pci_resume()

There was a similar fix for mpi_init_check() in commit
d71023af4bec ("scsi: pm80xx: Do not busy wait in MPI init check")

Link: https://lore.kernel.org/r/20210406180534.1924345-3-ipylypiv@google.com
Reviewed-by: Vishakha Channapattan <vishakhavc@google.com>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>