[title]
Confirm that all available z/VM IUCV HVC terminals are enabled for logins

[description]
The z/VM IUCV Hypervisor Console (HVC) device driver can manage up to
eight HVC terminals that can be enabled for user logins.  The number
of HVC terminals is specified through a kernel parameter.

HVC terminals that are not enabled for logins serve no purpose and
cannot provide access to the Linux instance in emergencies.

This check confirms that all available HVC terminals are enabled for
user logins.

[param min_hvc_iucv]
Specifies the minimum number of HVC terminal devices that must be
available.  This in an integer number in the range from 1 to 8.
