Log Message:
Update to libdrm-2.4.11.

Changes from xorg-announce@:
Delete extra libdrm_lists.h line after libdrm_la_SOURCES in libdrm/Makefile.am
Use C99 versions of __FUNCTION__ & __volatile__ when not building with gcc
nouveau: store bo handle in public struct in bo_ref_handle
nouveau: write posting got lost somewhere, bring it back
Add new drm_intel_get_pipe_from_crtc_id function.
nouveau: fix ppc for swab changes in Linux 2.6.29
libdrm/mode: align subpixel results
intel: NULL fake bo block when freeing in evict_all
libdrm/intel: assert that clients are using bo refcounting correctly
libdrm/intel: add drm_intel_bo_disable_reuse api
Bump to version 2.4.10 to mark addition of drm_intel_bo_disable_reuse
libdrm/intel: Make get_pipe_from_crtc_id per-bufmgr. Return -1 on failure.
nouveau: backlight compat fix