The vfio module only exposes the enable_unsafe_noiommu_mode parameter
if CONFIG_VFIO_NOIOMMU is enabled. When it isn't, the module
will complain about an unknown parameter:
vfio: unknown parameter 'enable_unsafe_noiommu_mode' ignored
As CONFIG_VFIO_NOIOMMU is disabled by the module package,
we can remove the module loading parameter.
Signed-off-by: Mathew McBride <matt@traverse.com.au>