RSE: Replace TC2 jobs with TC3

The TC3 FVP and software stack have been released publicly and TC2 will
likely be deprecated soon, so switch RSE testing over to TC3.

Signed-off-by: Jamie Fox <jamie.fox@arm.com>
Change-Id: I0414934776f2689a5618379734204269ca776dc1
diff --git a/build_helper/build_helper_config_maps.py b/build_helper/build_helper_config_maps.py
index 4649259..5e5aae5 100644
--- a/build_helper/build_helper_config_maps.py
+++ b/build_helper/build_helper_config_maps.py
@@ -25,7 +25,7 @@
     "arm/corstone1000"                   : "corstone1000",
     "arm/mps4/corstone315"               : "corstone315",
     "arm/mps3/corstone310/fvp"           : "corstone310",
-    "arm/rse/tc/tc2"                     : "RSE_TC2",
+    "arm/rse/tc/tc3"                     : "RSE_TC3",
     "arm/rse/rdfremont"                  : "RSE_RDFremont",
     "arm/rse/automotive_rd/rd1ae"        : "RSE_RD1AE",
     "cypress/psoc64"                     : "psoc64",