ucsi: Increase thread stack size

BUG=b:493948360
TEST=checked on moonstone

Change-Id: If5e9add2a656c1826ae65087f4af14c71163e205
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/7701880
Auto-Submit: caveh jalali <caveh@chromium.org>
Tested-by: caveh jalali <caveh@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Keith Short <keithshort@chromium.org>

zephyr/subsys/ucsi/Kconfig

diff --git a/zephyr/subsys/ucsi/Kconfig b/zephyr/subsys/ucsi/Kconfig
index 923d1c9..7058311 100644
--- a/zephyr/subsys/ucsi/Kconfig
+++ b/zephyr/subsys/ucsi/Kconfig
@@ -10,7 +10,7 @@
 
 config UCSI_PPM_STACK_SIZE
 	int "UCSI PPM implementation thread stack size"
-	default 1024
+	default 1280
 	help
 	  Stack size of thread created for PPM.