Log Message:
Update to 2.4.49:

A new version of libdrm has been released. It adds support for 2D
tiling for Sea Islands Radeon GPUs and fixes bugs.

Ian Romanick (1):
      intel: Use memset instead of VG_CLEAR

Marek Olšák (3):
      radeon: implement 2D tiling for CIK
      radeon: handle P16 pipe configs for Hawaii
      Bump the version for release

Michel Dänzer (2):
      radeon: fix mipmap level 0 and 1 alignment for SI and CIK
      radeon: don't overallocate stencil by 4 on SI and CIK

Thomas Hellstrom (1):
      libdrm/mode: Update the encoder and connector defines