In a fit of confusion, I accidentally committed PR 879 before it passed its nxstyle check (it did pass all of its build tests, but not the style check). It was really my intention to merge PR878, but I screwed that up and merged 879 instead.
This PR makes amends by passing all of the .c and .h files modified by PR879 through nxstyle and correcting all reported style problems.
1. Add dsp extension; float point based on hardware and software.
2. Delete folder "iar"
3. Add tool chain for cortex-M23 and cortex-M35p
Signed-off-by: qiaowei <qiaowei@xiaomi.com>
Change-Id: I5bfc78abb025adb0ad4fae37e2b444915f477fe7
