Tegra2: Do pinmux_init more early.

Do pinmux_init early to make LCD power signals keep on
low level before LCD power on.
Add the delay T1 between between panel power on and data out.

Note: Other corresponding change is:
      http://gerrit.chromium.org/gerrit/3308

BUG=chrome-os-partner:1957
TEST=test on Kaen, Foxconn confirmed the timing already
can meet panel spec about power on sequence.

Change-Id: I22636a8c8d1f6ee715babe7828c80613a8f3ba1c
Signed-off-by: Dilan Lee <dilee@nvidia.com>
Reviewed-on: http://gerrit.chromium.org/gerrit/3309
Reviewed-by: Simon Glass <sjg@chromium.org>
3 files changed