drm/i915/vlv: add early DPIO init v3

Just add an early init since we may need to access DPIO regs early on.
The init call in modeset_init_hw is also needed for the resume case,
when we need to reset DPIO to keep things happy.

v2: split reset and reg init
v3: split patches (Daniel)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a40651e..9405340 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10871,6 +10871,8 @@
 		}
 	}
 
+	intel_init_dpio(dev);
+
 	intel_cpu_pll_init(dev);
 	intel_shared_dpll_init(dev);