scsi: pm8001: Staticify 'pm80xx_pci_mem_copy' and 'mpi_set_phy_profile_req'

scsi: pm8001: Staticify 'pm80xx_pci_mem_copy' and 'mpi_set_phy_profile_req'

These are not invoked externally.

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/pm8001/pm80xx_hwi.c:69:6: warning: no previous prototype for ‘pm80xx_pci_mem_copy’ [-Wmissing-prototypes]
 69 | void pm80xx_pci_mem_copy(struct pm8001_hba_info *pm8001_ha, u32 soffset,
 | ^~~~~~~~~~~~~~~~~~~
 drivers/scsi/pm8001/pm80xx_hwi.c:5016:6: warning: no previous prototype for ‘mpi_set_phy_profile_req’ [-Wmissing-prototypes]
 5016 | void mpi_set_phy_profile_req(struct pm8001_hba_info *pm8001_ha,
 | ^~~~~~~~~~~~~~~~~~~~~~~

Link: https://lore.kernel.org/r/20200721164148.2617584-26-lee.jones@linaro.org
Cc: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>