rk3288: set cpu frequency up to 1.8GHz

before the rkclk_init(), we must set rk808
buck1 voltage up to 1300mv

BUG=chrome-os-partner:32716, chrome-os-partner:31896
TEST=Boot on veyron_pinky rev2,check the rk808 buck1 voltage 1300mv
     and check the cpu frequency up to 1.8GHz

Original-Change-Id: I6a8c6e35bd7cc6017f2def72876a9170977f206e
Original-Signed-off-by: huang lin <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/222957
Original-Reviewed-by: Doug Anderson <dianders@chromium.org>

(cherry picked from commit 2e7e7c265691250d4a1b3ff94fe70b0a05f23e16)
Signed-off-by: Aaron Durbin <adurbin@chromium.org>

Change-Id: Iff89d959456dd4d36f4293435caf7b4f7bdaf6fd
Reviewed-on: http://review.coreboot.org/9260
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
6 files changed