Current names are reported as "K750", "M705", and it can be misleading
for the users when they look at their input device list.

Prefixing the names with "Logitech " makes things better.
Signed-off-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: NPeter Wu <peter@lekensteyn.nl>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>