mb/google/kahlee: Tune eDP panel initialization time

1. Add two parameters for panel initialization timing.
   > lvds_poseq_varybl_to_blon
   > lvds_poseq_blon_to_varybl
2. The BL_PWM is controlled by APU_EDP_BKLTEN_L/APU_DP_VARY_BL/
   EDP_BKLTEN_L, so move APU_EDP_BKLTEN_L to early init stage,
   and be enabled depends on SKU, thus we can control the delay
   time by config APU_DP_VARY_BL.

BUG=b:118011567
TEST=emerge-grunt coreboot.

Change-Id: Ib20c48813b208d697b950b2f02a70a690e483fdb
Signed-off-by: Chris Wang <chris.wang@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/29469
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions