Input: i8042 - add Acer Aspire 5536 to the nomux list

When KBC is in active multiplexing mode, disabling and re-enabling the
touchpad with the special key leaves the touchpad dead. Since the laptop
does not have any external PS/2 ports disabling MUX mode should be safe.

Reported-by: Eugeniy Meshcheryakov <eugen@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>