max77759_charger: add gpio to check ls1 switch open

This is similar to the initial API: uses an additional GPIO to check
if the lsw1 switch is actually open.

Bug: 179782740
Test: Connect headset, disconnect, check DRP toggle time
Signed-off-by: AleX Pelosi <[email protected]>
Change-Id: Id02e8b63ffa865d4aae4a991cb70afc3ca44cfd6
2 files changed