documentation/bsp-guide/bsp.xml: bsp exmaple name fixed

Changed the example BSP name 'meta-intel_n450' to 'meta-n450' in
the section 'Example Filesystem Layout.'  Error found by Jiajun Xu.

(From yocto-docs rev: a8fa9410b3c2e2111af6c7b700044a7a1ecdb59e)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/bsp-guide/bsp.xml

@@ -64,7 +64,7 @@
                 Here are some example base directory names:
                 <literallayout class='monospaced'>
      meta-emenlow
-     meta-intel_n450
+     meta-n450
      meta-beagleboard
                 </literallayout>
             </para>