compat: Backport vga_switcheroo_client_ops

compat: Backport vga_switcheroo_client_ops

This backports:

  From 26ec685ff9d9c16525d8ec4c97e52fcdb187b302 Mon Sep 17 00:00:00

  From: Takashi Iwai <tiwai@suse.de>
  Date: Fri, 11 May 2012 07:51:17 +0200
  Subject: [PATCH] vga_switcheroo: Introduce struct vga_switcheroo_client_ops

  only for kernels >= 2.6.34 in which vga_switcheroo is available.

  Trying kernel                     3.4.0-030400-generic    [OK]
  Trying kernel                     3.3.7-030307-generic    [OK]
  Trying kernel                     3.2.2-030202-generic    [OK]
  Trying kernel                    3.1.10-030110-generic    [OK]
  Trying kernel                    3.0.18-030018-generic    [OK]
  Trying kernel                  2.6.39-02063904-generic    [OK]
  Trying kernel                  2.6.38-02063808-generic    [OK]
  Trying kernel                  2.6.37-02063706-generic    [OK]
  Trying kernel                  2.6.36-02063604-generic    [OK]
  Trying kernel                  2.6.35-02063512-generic    [OK]
  Trying kernel                  2.6.34-02063410-generic    [OK]
  Trying kernel                  2.6.33-02063305-generic    [OK]
  Trying kernel                  2.6.32-02063255-generic    [OK]
  Trying kernel                  2.6.31-02063113-generic    [OK]
  Trying kernel                  2.6.30-02063010-generic    [OK]
  Trying kernel                  2.6.29-02062906-generic    [OK]
  Trying kernel                  2.6.28-02062810-generic    [OK]
  Trying kernel                    2.6.27-020627-generic    [OK]
  Trying kernel                    2.6.26-020626-generic    [OK]
  Trying kernel                    2.6.25-020625-generic    [OK]
  Trying kernel                    2.6.24-020624-generic    [OK]

Signed-off-by: Ozan Çağlayan <ozancag@gmail.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>