gt510 has two capacitive keys on the bottom. Define keycodes to enable
them.
Signed-off-by: Nikita Travkin <nikita@trvn.ru>
Link: https://lore.kernel.org/r/20230725-gt5-panel-v1-3-7c787e33a614@trvn.ruSigned-off-by: Bjorn Andersson <andersson@kernel.org>