yocto-bsp: clarify help with reference to meta-intel

The current yocto-bsp help assumes knowledge that the meta-intel layer
needs to be cloned before it's put into the BBLAYERS.  Avoid the
guesswork and state the details explicitly in the help.

Also, the shorter 'usage' string doesn't mention it at all; it would
help to at minimum mention it and refer the user to the detailed help.

Fixes [YOCTO #2330].

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/bsp/help.py

@@ -115,6 +115,18 @@ yocto_bsp_create_usage = """
  'properties' that will be used to fill out the BSP-specific portions
  of the BSP.  The possible values for the 'karch' paramter can be
  listed via 'yocto-bsp list karch'.
+
+ NOTE: Once created, you should add your new layer to your
+ bblayers.conf file in order for it to be subsequently seen and
+ modified by the yocto-kernel tool.
+
+ See 'yocto bsp help create' for more detailed instructions.
+
+ NOTE: For x86- and x86_64-based BSPs, the generated BSP assumes the
+ presence of the meta-intel layer. Ensure the meta-intel layer is
+ present and added to bblayers.conf.
+
+ See 'yocto bsp help create' for more detailed instructions.
 """
 
 yocto_bsp_create_help = """
@@ -156,12 +168,40 @@ DESCRIPTION
     current directory, and is useful for debugging.
 
     NOTE: Once created, you should add your new layer to your
-    bblayers.conf file in order for it to be subsquently seen and
+    bblayers.conf file in order for it to be subsequently seen and
     modified by the yocto-kernel tool.
 
-    NOTE for x86- and x86_64-based BSPs: The generated BSP assumes the
-    presence of the of the meta-intel layer, so you should also have a
-    meta-intel layer present and added to your bblayers.conf as well.
+    For example, assuming your poky repo is at /path/to/poky, your new
+    BSP layer is at /path/to/poky/meta-mybsp, and your build directory
+    is /path/to/build:
+
+    $ gedit /path/to/build/conf/bblayers.conf
+
+    BBLAYERS ?= " \\
+      /path/to/poky/meta \\
+      /path/to/poky/meta-yocto \\
+      /path/to/poky/meta-mybsp \\
+      "
+
+    NOTE: For x86- and x86_64-based BSPs, the generated BSP assumes
+    the presence of the meta-intel layer. Ensure the meta-intel layer
+    is present and added to bblayers.conf.
+
+    For example, assuming your poky repo is at /path/to/poky, your new
+    BSP layer is at /path/to/poky/meta-mybsp, and your build directory
+    is /path/to/build:
+
+    $ cd /path/to/poky
+    $ git clone git://git.yoctoproject.org/meta-intel.git
+
+    $ gedit /path/to/build/conf/bblayers.conf
+
+    BBLAYERS ?= " \\
+      /path/to/poky/meta \\
+      /path/to/poky/meta-yocto \\
+      /path/to/poky/meta-intel \\
+      /path/to/poky/meta-mybsp \\
+      "
 """
 
 yocto_bsp_list_usage = """