Input: psmouse - fix comment style

The module was using non-standard comment style with comment blocks often
starting at the very beginning of a line instead of being aligned with the
code. Let's switch to standard formatting.

Reviewed-by: Hans de Goede <[email protected]>
Reviewed-by: Pali Rohár <[email protected]>
Tested-by: Marcin Sochacki <[email protected]>
Tested-by: Till <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>