ARM: Tegra210: Add SoC code/include files for T210

All based off of Tegra124. As a Tegra210 board is brought
up, these may change a bit to match the HW more closely,
but probably 90% of this is identical to T124.

Note that since T210 is a 64-bit build, it has no SPL
component, and hence no cpu.c for Tegra210.

Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/tegra210/Kconfig b/arch/arm/mach-tegra/tegra210/Kconfig
new file mode 100644
index 0000000..f2a0059
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra210/Kconfig
@@ -0,0 +1,11 @@
+if TEGRA210
+
+choice
+	prompt "Tegra210 board select"
+
+endchoice
+
+config SYS_SOC
+	default "tegra210"
+
+endif