build from commit:
f59a57c plat: rk3308: improve global 1st reset hold
update features:
- support atags;
- support preloader serial;
- support serial runtime configure from fiq-debugger driver;
- use global 1st/2nd reset dynamicly, 1st reset can make gpio
ignore 1st reset if needed;
- support armoff with pdm_m clk alive if needed.
Change-Id: Ib625808bac9325076f00f267792f01e658215ca5
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
bd359a8db5