Add gpio and gm20b branches for v4.7

These branches contain a couple of fixes and device tree binding support
for the Tegra186 GPIO/AON controller as well as fixup the gm20b GPU node
in the Tegra210 device tree.

Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/tegra-branches.sh.dot b/tegra-branches.sh.dot
index 383c690..1e9a8ea 100644
--- a/tegra-branches.sh.dot
+++ b/tegra-branches.sh.dot
@@ -12,3 +12,5 @@
 branches="${branches} for-4.7/xusb" # on for-4.7/phy, for-4.7/pci, for-4.7/xhci
 
 branches="${branches} for-4.7/genpd" # on for-4.7/soc
+branches="${branches} for-4.7/gpio" # on v4.6-rc1
+branches="${branches} for-4.7/gm20b" # on v4.6-rc1