[BUG] ata: pata_marvell: Warning when probing the module

[Zheyu Ma]

Hello,

I found a bug in the pata_marvell module.
When probing the driver, it seems to trigger the error path and
executes the function marvell_cable_detect(), but the
'ap->ioaddr.bmdma_addr' is not initialized, which causes a warning.

The following log can reveal it:

[    3.453943] Bad IO access at port 0x1 (return inb(port))
[    3.454430] WARNING: CPU: 7 PID: 291 at lib/iomap.c:44 ioread8+0x4a/0x60
[    3.457962] RIP: 0010:ioread8+0x4a/0x60
[    3.466362] Call Trace:
[    3.466572]  <TASK>
[    3.466756]  marvell_cable_detect+0xad/0xf0 [pata_marvell]
[    3.467699]  ata_eh_recover+0x3520/0x6cc0
[    3.473262]  ata_do_eh+0x49/0x3c0
[    3.473906]  ata_scsi_port_error_handler+0xd96/0x1d00
[    3.474355]  ata_scsi_error+0x243/0x290
[    3.475428]  scsi_error_handler+0x2ff/0xea0
[    3.477244]  kthread+0x262/0x2e0