drivers: serial: stm32: Add wakeup capability support

Add wakeup capability support.
wip comment

(cherry picked from commit 4422de5692bec134ca0269ad54c4b3aace1c8188)

Original-Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
GitOrigin-RevId: 4422de5692bec134ca0269ad54c4b3aace1c8188
Change-Id: I7b6ed1f8d82321a0ebd168df0fe4a609852ec673
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/3829401
Tested-by: CopyBot Service Account <copybot.service@gmail.com>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
diff --git a/src/third_party/zephyr/main b/src/third_party/zephyr/main
index e2f45ac..324770a 160000
--- a/src/third_party/zephyr/main
+++ b/src/third_party/zephyr/main
@@ -1 +1 @@
-Subproject commit e2f45ac854a2fbe876e850cbf23b02eb0e8e575f
+Subproject commit 324770a07e6813b9178866ff7682918e807deecc