boards: lilygo: ttgo_tbeam: initial support

adds initial support for Lilygo TTGO TBeam board

Co-authored-by: Jamie <40387179+nordicjm@users.noreply.github.com>
Co-authored-by: Benjamin Cabé <benjamin@zephyrproject.org>

Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
15 files changed