staging: qlge: Remove bq_desc.maplen

The size of the mapping is known statically in all cases, there's no need
to save it at runtime. Remove this member.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Acked-by: Manish Chopra <manishc@marvell.com>
Link: https://lore.kernel.org/r/20190927101210.23856-6-bpoirier@suse.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>