xf86-video-cirrus: update to 1.6.0.

Adam Jackson (3):
      Remove (almost) no-op setup functions
      Don't build split alpine and laguna support
      alpine: Default to 16bpp

Alan Coopersmith (6):
      Update README for gitlab migration
      Update configure.ac bug URL for gitlab migration
      Build xz tarballs instead of bzip2
      Fix spelling/wording issues
      gitlab CI: add a basic build test
      xf86-video-cirrus 1.6.0

Emil Velikov (1):
      autogen.sh: use quoted string variables

Frederic Crozat (1):
      Use 16bpp when running in virt and on XenSource gfx

Kevin Brace (18):
      Eliminate unused variable compilation warning
      Use const char for xf86GetOptValString return type
      Suppress unused label compilation warning
      Fix for a compilation error when compiling XAA related files
      Tab to spaces conversion for cir.h
      Eliminate pointer arithmetic compilation warnings
      Tab to spaces conversion for lg_driver.c
      Fix indentation of lg_driver.c
      Make adjustments to code comments of lg_driver.c
      Fix for Laguna I2C bus code compilation error
      Check for a successful transmission of EDID for Laguna I2C bus code
      Activate I2C bus for Laguna based devices
      Tab to spaces conversion for lg_i2c.c
      Fix indentation of lg_i2c.c
      Declare an I2C bus name string as a static type for lg_i2c.c
      Declare an I2C bus name string as a static type for alp_i2c.c
      Stop accessing SR12 and SR13
      Save and restore RIF Control and RAC Control registers

Mihail Konev (1):
      autogen: add default patch prefix

Peter Hutterer (1):
      autogen.sh: use exec instead of waiting for configure to finish

Stefan Dirsch (1):
      Disable "acceleration" under qemu

(wiz)