Instead of forcing use of NEWLIB_LIBC, select any available complete C
library implementation. Add CONFIG_REQUIRES_FLOAT_PRINTF where needed.
Signed-off-by: Keith Packard <keithp@keithp.com>
Import a selection of tests from the CMSIS-NN unit testing suite to
validate that the integration into Zephyr is working correctly.
Complete functional testing is left to the complete set of unit-tests
in the externally maintained code.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>