[autotest] Enable Chameleon suites to run nightly on >=tot-1 branches

Enable Chameleon suites to run on the latest two branches to have
a better coverage.

BUG=None
TEST=./site_utils/suite_scheduler/suite_scheduler.py --sanity

Change-Id: I5718333b7710e50b9d7444def900f674235184f3
Reviewed-on: https://chromium-review.googlesource.com/262302
Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Commit-Queue: Wai-Hong Tam <waihong@chromium.org>
Trybot-Ready: Wai-Hong Tam <waihong@chromium.org>
Tested-by: Wai-Hong Tam <waihong@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index bdd19cb..0531a79 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -44,35 +44,35 @@
 [ChameleonDp]
 run_on: nightly
 suite: chameleon_dp
-branch_specs: ==tot
+branch_specs: >=tot-1
 pool: chameleon
 file_bugs: True
 
 [ChameleonDpWeekly]
 run_on: weekly
 suite: chameleon_dp_weekly
-branch_specs: ==tot
+branch_specs: >=tot-1
 pool: chameleon
 file_bugs: True
 
 [ChameleonHdmi]
 run_on: nightly
 suite: chameleon_hdmi
-branch_specs: ==tot
+branch_specs: >=tot-1
 pool: chameleon
 file_bugs: True
 
 [ChameleonHdmiWeekly]
 run_on: weekly
 suite: chameleon_hdmi_weekly
-branch_specs: ==tot
+branch_specs: >=tot-1
 pool: chameleon
 file_bugs: True
 
 [ChameleonVga]
 run_on: nightly
 suite: chameleon_vga
-branch_specs: ==tot
+branch_specs: >=tot-1
 pool: chameleon
 
 [NightlyHwQual]
@@ -457,18 +457,6 @@
 branch_specs: >=tot-2
 pool: suites
 
-[WeeklyChameleonDp]
-run_on: weekly
-suite: chameleon_dp
-branch_specs: >=tot-1
-pool: chameleon
-
-[WeeklyChameleonHdmi]
-run_on: weekly
-suite: chameleon_hdmi
-branch_specs: >=tot-1
-pool: chameleon
-
 [WeeklyNightlyHwQual]
 run_on: weekly
 suite: hwqual