add patches from the -stable queue:

* add patches from the -stable queue:
  - drm-i915-fix-display-power-sw-state-reporting
  - arch-unicore32-mm-alignment.c-include-asm-pgtable.h-to-avoid-compiling-
    error
  - drivers-video-fbdev-fb-puv3.c-add-header-files-for-function-unifb_mmap
  - mm-numa-remove-bug_on-in-__handle_mm_fault
* drop removed -stable patches:
  - proc-stat-convert-to-single_open_size
  - md-make-sure-get_array_info-ioctl-reports-correct-clean-status
* import v3.15.5-rc1.
NOT RELEASED YET

* NOT RELEASED YET
* set ABI to 5.slh.1.