ARM: tegra: Add support for nyan-big board

Nyan-big is a Tegra124 clamshell board that is very similar to venice2, but
it has a different panel, the sdcard cd and wp sense are flipped, and it has
a different revision of the AS3722 PMIC.

This is the Acer Chromebook 13 CB5-311-T7NN (13.3-inch HD, NVIDIA
Tegra K1, 2GB). The display is not currently supported, so it should
boot on other nyan-based Chromebooks also, but only the device tree for
nyan-big is provided here.

The device tree file is from Linux but with features removed which are
unlikely to be supported in U-Boot soon (regulators, pinmux). Also the
addresses are updated to 32-bit.

Signed-off-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
(rebase, change to 'nyan-big', fix pinmux that resets nyan-big)
diff --git a/arch/arm/cpu/armv7/tegra124/Kconfig b/arch/arm/cpu/armv7/tegra124/Kconfig
index 6a1c83a..88f627c 100644
--- a/arch/arm/cpu/armv7/tegra124/Kconfig
+++ b/arch/arm/cpu/armv7/tegra124/Kconfig
@@ -6,6 +6,15 @@
 config TARGET_JETSON_TK1
 	bool "NVIDIA Tegra124 Jetson TK1 board"
 
+config TARGET_NYAN_BIG
+	bool "Google/NVIDIA Nyan-big Chrombook"
+	help
+	  Nyan Big is a Tegra124 clamshell board that is very similar
+	  to venice2, but it has a different panel, the sdcard CD and WP
+	  sense are flipped, and it has a different revision of the AS3722
+	  PMIC. The retail name is the Acer Chromebook 13 CB5-311-T7NN
+	  (13.3-inch HD, NVIDIA Tegra K1, 2GB).
+
 config TARGET_VENICE2
 	bool "NVIDIA Tegra124 Venice2"
 
@@ -15,6 +24,7 @@
 	default "tegra124"
 
 source "board/nvidia/jetson-tk1/Kconfig"
+source "board/nvidia/nyan-big/Kconfig"
 source "board/nvidia/venice2/Kconfig"
 
 endif