build from:
a152c641 static ta: support read data from user ta
Update feature:
c6f29a87 ta verify: support new key to sign TA
9b9d28dd rk_atags: support before mmu enable
899d02e7 console_init: set printf uart from rk_atags
Change-Id: Ie1c348964cd43d55a86ff3ffc119f0e3d9787fec
Signed-off-by: Hisping Lin <hisping.lin@rock-chips.com>