sm6250-common: overlay-lineage: set config_haveNotch overlay to true

This device has a notch, but this was never set, so users were still able to
do things like enabling the network traffic monitor or setting the clock
position to center, both of which would not be fully visible due to the
notch.

Change-Id: I2aaa0c06b23b40aac120c325ce15fb0992463520