Input: synaptics - enable RMI on HP Envy 13-ad105ng

This laptop (and perhaps other variants of the same model) reports an
SMBus-capable Synaptics touchpad. Everything (including suspend and
resume) works fine when RMI is enabled via the kernel command line, so
let's add it to the whitelist.

Signed-off-by: Yussuf Khalil <dev@pp3345.net>
Link: https://lore.kernel.org/r/20200307213508.267187-1-dev@pp3345.net


Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>