HID: logitech-hidpp: Fix "Sw. Id." for HID++ 2.0 commands

Always set a non-zero "Sw. Id." in the lower nibble of the Function/ASE
and Software Identifier byte in HID++ 2.0 commands.

As per the "Protocol HID++2.0 essential features" section in
https://lekensteyn.nl/files/logitech/logitech_hidpp_2.0_specification_draft_2012-06-04.pdf
"
Software identifier (4 bits, unsigned)

A number uniquely defining the software that sends a request. The
firmware must copy the software identifier in the response but does
not use it in any other ways.

0 Do not use (allows to distinguish a notification from a response).
"

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215699
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>