[Intel-gfx] [PATCH] drm/i915: PSR: Fix DP_PSR_NO_TRAIN_ON_EXIT logic

[shuang.he at intel.com]

Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 6179
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                 -2              276/276              274/276
ILK                                  301/301              301/301
SNB                 -1              316/316              315/316
IVB                                  328/328              328/328
BYT                                  285/285              285/285
HSW                                  394/394              394/394
BDW                                  321/321              321/321
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 PNV  igt at gen3_render_mixed_blits      FAIL(3)PASS(4)      FAIL(2)
 PNV  igt at gen3_render_tiledx_blits      FAIL(4)PASS(4)      FAIL(2)
*SNB  igt at kms_flip@dpms-vs-vblank-race      PASS(5)      DMESG_WARN(1)PASS(1)
(dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
Note: You need to pay more attention to line start with '*'