HID: topre: Add support for 87 keys Realforce R2

The tenkeyless version of the Realforce R2 has the same issue of the
full size one, the report fixup is needed to make n-key rollover
work instead of 6 key rollover

Signed-off-by: Alessandro Manca <crizan.git@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>