gve: Add counter adminq_get_ptype_map_cnt to stats report

This counter counts the number of times get_ptype_map is executed on the
admin queue, and was previously missing from the stats report.

Signed-off-by: John Fraker <jfraker@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240325223308.618671-1-jfraker@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>