feat(mt8186): add common and MT8186 TRNG driver

Introduce a common RNG driver along with the specific driver for MT8186
platform.

Change-Id: I9f4437b6a4b3e8564a035ff5abb681bcfe85bd1e
Signed-off-by: Suyuan Su <suyuan.su@mediatek.com>
Signed-off-by: Gavin Liu <gavin.liu@mediatek.com>
6 files changed