Update build configs for multiple rockchip platforms

This is needed to support compiling new source file in TF-A which
adds support for stack protection.
Also updated the default tf-a build configs for these 4 platforms:
1. rk3328
2. rk3368
3. rk3399
4. px30

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ia7921a21f83edead9e3f4c61b1f45b9781d2e039
5 files changed