FROMLIST: dts/arm/st/f1: Add support for F103xG

Add a dtsi file for the F103xG chips, which have 1 MB of flash,
96 KB of ram, and several extra peripherals including ADC3 and
TIM9/10/11/12/13/14.

BUG=b:168351243
TEST=build chameleon

Change-Id: I93f0c4fd924a02740741e654476bea2a134ebfa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/2412671
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>
Tested-by: Paul Fagerburg <pfagerburg@chromium.org>
2 files changed