GitLab

And return NULL if we didn't get them in bl aux params otherwise reset and poweroff
will be broken on platforms that do not have reset and poweroff GPIOs.

Fixes: c1185ffd

 ("plat/rockchip: Switch to use new common BL aux parameter library")
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Change-Id: Ic6cf6383d8f05d745e2c5d5e1b1df38514ea8429