tegra: switch to DT only

We will follow the Linux kernel and go devicetree only for Tegra. This
doesn't prevent specific code for certain boards, but always requires a
valid DTB for all boards.

Also regenerate the AC100 defconfig to reflect this change.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Tested-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/Kconfig

@@ -139,6 +139,9 @@ config ARCH_TEGRA
 	bool "NVIDIA Tegra"
 	select CPU_V7
 	select HAS_DEBUG_LL
+	select BUILTIN_DTB
+	select OFDEVICE
+	select OFTREE
 
 config ARCH_ZYNQ
 	bool "Xilinx Zynq-based boards"

arch/arm/configs/toshiba_ac100_defconfig

@@ -1,3 +1,4 @@
+CONFIG_BUILTIN_DTB_NAME="tegra20-paz00"
 CONFIG_ARCH_TEGRA=y
 CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
 CONFIG_TEXT_BASE=0x01000000
@@ -14,6 +15,7 @@ CONFIG_ENABLE_DEVICE_NOISE=y
 CONFIG_CMD_SLEEP=y
 # CONFIG_CMD_TRUE is not set
 # CONFIG_CMD_FALSE is not set
+CONFIG_CMD_TFTP=y
 CONFIG_CMD_LOADB=y
 CONFIG_CMD_LOADY=y
 CONFIG_CMD_LOADS=y
@@ -23,11 +25,10 @@ CONFIG_CMD_SHA1SUM=y
 CONFIG_CMD_BOOTM_SHOW_TYPE=y
 CONFIG_CMD_RESET=y
 CONFIG_CMD_GO=y
+CONFIG_CMD_OFTREE=y
 CONFIG_NET=y
 CONFIG_NET_DHCP=y
 CONFIG_NET_PING=y
-CONFIG_CMD_TFTP=y
-CONFIG_FS_TFTP=y
 CONFIG_NET_NETCONSOLE=y
 CONFIG_DRIVER_SERIAL_NS16550=y
 CONFIG_NET_USB=y
@@ -36,4 +37,5 @@ CONFIG_NET_USB_ASIX=y
 CONFIG_USB=y
 CONFIG_USB_EHCI=y
 CONFIG_USB_STORAGE=y
+CONFIG_FS_TFTP=y
 CONFIG_FS_FAT=y

arch/arm/dts/tegra20-paz00.dts

@@ -0,0 +1,12 @@
+/dts-v1/;
+
+/include/ "tegra20.dtsi"
+
+/ {
+	model = "Toshiba AC100 / Dynabook AZ";
+	compatible = "compal,paz00", "nvidia,tegra20";
+
+	memory {
+		reg = <0x00000000 0x20000000>;
+	};
+};

arch/arm/dts/tegra20.dtsi

@@ -0,0 +1,5 @@
+/include/ "skeleton.dtsi"
+
+/ {
+	compatible = "nvidia,tegra20";
+};