idpf: fix LAN memory regions command on some NVMs

idpf: fix LAN memory regions command on some NVMs

IPU SDK versions 1.9 through 2.0.5 require send buffer to contain a single
empty memory region. Set number of regions to 1 and use appropriate send
buffer size to satisfy this requirement.

Fixes: 6aa53e861c1a ("idpf: implement get LAN MMIO memory regions")
Suggested-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>