docs/case_closed_debugging_gsc.md: Add FPMCU console

The FPMCU console is available on devices with Ti50 (not Cr50).

BUG=b:418298959, b:140731892
TEST=view in gitiles

Change-Id: I8e2ec54dd6b49b586a327d396f49b9f26d0a2b97
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/6569434
Commit-Queue: Tom Hughes <tomhughes@chromium.org>
Tested-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
1 file changed