doc: board: tegra: update device information

Adjust and update existing manuals to reflect the most recent
updates.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/doc/board/microsoft/surface-rt.rst b/doc/board/microsoft/surface-rt.rst
index b5645e7..2b29cce 100644
--- a/doc/board/microsoft/surface-rt.rst
+++ b/doc/board/microsoft/surface-rt.rst
@@ -14,7 +14,7 @@
 
 .. code-block:: bash
 
-    $ export CROSS_COMPILE=arm-linux-gnueabi-
+    $ export CROSS_COMPILE=arm-none-eabi-
     $ make surface-rt_defconfig
     $ make
 
@@ -38,4 +38,4 @@
 To boot Linux, U-Boot will look for an ``extlinux.conf`` on MicroSD and then on
 eMMC. Additionally, if the Volume Down button is pressed while loading, the
 device will enter bootmenu. Bootmenu contains entries to mount MicroSD and eMMC
-as mass storage, fastboot, reboot, reboot RCM, poweroffand enter U-Boot console.
+as mass storage, fastboot, reboot, reboot RCM, poweroff and enter U-Boot console.