[BUGID# 553] - documentation/bsp-guide/bsp.xml: Re-write of click-through

[BUGID# 553] - documentation/bsp-guide/bsp.xml: Re-write of click-through

[BUGID# 553] - In the 'BSP Click-Through Licensing Procedure'
section, which is shared between the BSP Guide and the Poky
Reference Manual, there were three links to 'pokylinux.org'
sites.  These links were intended to help a user get a license
for encumbered BSPs.  However, the links never did work.  The
section also had some wording that described a propsed naming
convention for BSP tarballs that were encumbered and non-encumbered.
The naming convention is a good idea but has not been followed
so far.

I removed the links and replaced them with general instructions
on how to get through the licensing situation.  Also removed the
hard-line naming rules and replaces with a more general explanation
of how we are naming BSP (e.g. Crown Bay).

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>