commit ad19104f2807f879df0a4297c003d2af51660903
author Scott Worley <scott.worley@microchip.com> Thu Aug 05 11:15:48 2021 -0400
committer Christopher Friedt <chrisfriedt@gmail.com> Mon Aug 09 16:21:33 2021 -0400
tree 3b0473dddf00c96acc1576b49d8cd3846ece6db5
parent fdd234f48fa8a1d70d73d3b635358b76e813a1fb

Microchip: MEC172x: Add UART driver

Microchip XEC has been using the standard NS16550 driver.
Using the standard NS16550 driver requires extra HW programming
for XEC UART in board level and did not support XEC GIRQ interrupt
programming. We add an XEC specific driver and remove UART specific
register programming from the board level and implement interrupt
support. Also, by implementing a SoC specific driver we can add
driver PM in the future.

Signed-off-by: Scott Worley <scott.worley@microchip.com>