[Intel-gfx] [PATCH] drm: Add support to find drm_panel by name

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5711
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV              +1                 282/283              283/283
ILK                 -1              316/319              315/319
SNB                                  322/346              322/346
IVB                 -2              382/384              380/384
BYT                                  296/296              296/296
HSW                                  425/428              425/428
BDW                                  318/333              318/333
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 PNV  igt_gen3_render_linear_blits      CRASH(1, M23)PASS(2, M25M23)      PASS(1, M23)
*ILK  igt_kms_flip_rcs-flip-vs-panning-interruptible      PASS(2, M26)      DMESG_WARN(1, M26)
 IVB  igt_gem_pwrite_pread_snooped-pwrite-blt-cpu_mmap-performance      DMESG_WARN(2, M34)PASS(1, M21)      DMESG_WARN(1, M34)
*IVB  igt_gem_storedw_batches_loop_secure-dispatch      PASS(3, M21M34)      DMESG_WARN(1, M34)
Note: You need to pay more attention to line start with '*'