mtip32xx: Remove unnecessary pcim_iounmap_regions() calls

pcim_iounmap_regions() is deprecated. Moreover, it is not necessary to call
it in the driver's remove() function or if probe() fails, since it does
cleanup automatically on driver detach.

Remove all calls to pcim_iounmap_regions().

Signed-off-by: Philipp Stanner <phasta@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20250327110707.20025-3-phasta@kernel.org