arch-armv7ve: add tune include for armv7ve and use it from cortexa7 and cortexa15
* be aware that this -march value is available only in gcc-4.9 and
newer:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57907
* -mcpu=cortex15 and -mcpu=cortexa7 conflict with -march=armv7a
We either have to stop putting -march in default CCARGS or at
least set it compatible one like this patch does.
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
