kernel/freertos: Instead of use Kconfig items to compiler flags. [1/1]

PD#SWPL-68240

Problem:
Refactor for all.

Solution:
Instead of use Kconfig items to compiler flags.

Verify:
N/A

Change-Id: I23ae983e85c07dff3a3b156833d1a6b608abeaa5
Signed-off-by: Xiaohu.Huang <xiaohu.huang@amlogic.com>
7 files changed