Initial branches for v4.2

Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/tegra-branches.sh.dot b/tegra-branches.sh.dot
index a224b62..f727025 100644
--- a/tegra-branches.sh.dot
+++ b/tegra-branches.sh.dot
@@ -1,4 +1,3 @@
-merge_base=v4.0-rc1
+merge_base=v4.1-rc1
 
-branches="${branches} for-4.1/soc" # on v4.0-rc1
-branches="${branches} for-4.1/dt" # on v4.0-rc1
+branches="${branches} for-4.2/dt" # on v4.1-rc1