ish: add more explanations comments for reset flow in aontask
ish: add more explanations comments for reset flow in aontask

BRANCH=none
BUG=none
TEST=ISH still reset properly on arcada

Change-Id: I08a5935c5e8d1728e2984cbc70d75e380eb66f55
Signed-off-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1601349
Reviewed-by: Hebo Hu <62037f2eb941dcf8637076f5643d23e5a34f72cd@intel.corp-partner.google.com>
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Commit-Queue: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec