[Intel-gfx] [PATCH 7/7] drm/i915/skl: Take 90/270 rotation into account in watermark calculations

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5896
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  275/275              275/275
ILK                                  307/307              307/307
SNB                 -1              284/284              283/284
IVB                                  375/375              375/375
BYT                                  294/294              294/294
HSW                                  385/385              385/385
BDW                 -1              314/314              313/314
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*SNB  igt_gem_flink_bad-open      PASS(1)      DMESG_WARN(1)PASS(1)
*BDW  igt_gem_gtt_hog      PASS(2)      DMESG_WARN(1)PASS(1)
Note: You need to pay more attention to line start with '*'