ARM: tegra: Add device-tree for ASUS Transformer Pad TF300TG

Add device-tree for ASUS Transformer Pad TF300TG, which is a NVIDIA
Tegra30-based 2-in-1 detachable, originally running Android. It's a
variant of the TF300T that has a 3G modem.

Link: https://wiki.postmarketos.org/wiki/ASUS_Transformer_Pad_(asus-tf300t)Co-developed-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Ion Agorria <ion@agorria.com>
Co-developed-by: Maxim Schwalm <maxim.schwalm@gmail.com>
Signed-off-by: Maxim Schwalm <maxim.schwalm@gmail.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
[treding@nvidia.com: cosmetic fixups]
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/Makefile

@@ -1323,6 +1323,7 @@ dtb-$(CONFIG_ARCH_TEGRA_3x_SOC) += \
 	tegra30-asus-nexus7-tilapia-E1565.dtb \
 	tegra30-asus-tf201.dtb \
 	tegra30-asus-tf300t.dtb \
+	tegra30-asus-tf300tg.dtb \
 	tegra30-beaver.dtb \
 	tegra30-cardhu-a02.dtb \
 	tegra30-cardhu-a04.dtb \