Describe the expected usage of base architecture tune files and
arch-specific files, specifically the stacking of generations.
Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Richard Purdie <richard.purdie@linuxfoundation.org> Cc: Paul Eggleton <paul.eggleton@intel.com> Cc: Tom Zanussi <tom.zanussi@intel.com> Cc: Nitin Kamble <nitin.a.kamble@intel.com> Cc: Mark Hatle <mark.hatle@windriver.com> Cc: Bruce Ashfield <bruce.ashfield@windriver.com> Cc: Martin Jansa <martin.jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>