arm/dt: tegra: Remove /chosen node

The command-lines present in the existing /chosen node are not necessarily
correct for all users. Ideally, we should simply use the command-line
supplied by the boot-loader.

In fact, using the boot-loader's cmdline is quite easy; either the
bootloader fully supports DT, in which case it can modify the DT passed
to the kernel to include its command-line, or CONFIG_APPENDED_DTB can
be used in conjunction with CONFIG_ARM_ATAG_DTB_COMPAT, and the kernel
will substitute the bootloader's command-line into the DT.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

arch/arm/boot/dts/tegra-harmony.dts

@@ -6,10 +6,6 @@
 	model = "NVIDIA Tegra2 Harmony evaluation board";
 	compatible = "nvidia,harmony", "nvidia,tegra20";
 
-	chosen {
-		bootargs = "vmalloc=192M video=tegrafb console=ttyS0,115200n8 root=/dev/mmcblk0p2 rw rootwait";
-	};
-
 	memory@0 {
 		reg = < 0x00000000 0x40000000 >;
 	};

arch/arm/boot/dts/tegra-paz00.dts

@@ -6,10 +6,6 @@
 	model = "Toshiba AC100 / Dynabook AZ";
 	compatible = "compal,paz00", "nvidia,tegra20";
 
-	chosen {
-		bootargs = "console=ttyS0,115200n8 root=/dev/mmcblk0p1";
-	};
-
 	memory@0 {
 		reg = <0x00000000 0x20000000>;
 	};

arch/arm/boot/dts/tegra-seaboard.dts

@@ -6,10 +6,6 @@
 	model = "NVIDIA Seaboard";
 	compatible = "nvidia,seaboard", "nvidia,tegra20";
 
-	chosen {
-		bootargs = "vmalloc=192M video=tegrafb console=ttyS0,115200n8 root=/dev/mmcblk1p3 rw rootwait";
-	};
-
 	memory {
 		device_type = "memory";
 		reg = < 0x00000000 0x40000000 >;

arch/arm/boot/dts/tegra-trimslice.dts

@@ -6,10 +6,6 @@
 	model = "Compulab TrimSlice board";
 	compatible = "compulab,trimslice", "nvidia,tegra20";
 
-	chosen {
-		bootargs = "vmalloc=192M video=tegrafb console=ttyS0,115200n8 root=/dev/mmcblk0p1 rw rootwait";
-	};
-
 	memory@0 {
 		reg = < 0x00000000 0x40000000 >;
 	};

arch/arm/boot/dts/tegra-ventana.dts

@@ -6,10 +6,6 @@
 	model = "NVIDIA Tegra2 Ventana evaluation board";
 	compatible = "nvidia,ventana", "nvidia,tegra20";
 
-	chosen {
-		bootargs = "vmalloc=192M video=tegrafb console=ttyS0,115200n8 root=/dev/ram rdinit=/sbin/init";
-	};
-
 	memory {
 		reg = < 0x00000000 0x40000000 >;
 	};