drm/i915: Drop const qualifiers from params in wait_for_register()

These params are passed by value, const qualifiers are ignored any way.
While around, unify timeout_ms type from long to int.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170410093817.151280-1-michal.wajdeczko@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_drv.h

@@ -3085,22 +3085,22 @@ void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);
 
 int intel_wait_for_register(struct drm_i915_private *dev_priv,
 			    i915_reg_t reg,
-			    const u32 mask,
-			    const u32 value,
-			    const unsigned long timeout_ms);
+			    u32 mask,
+			    u32 value,
+			    unsigned int timeout_ms);
 int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv,
 				 i915_reg_t reg,
-				 const u32 mask,
-				 const u32 value,
-				 const unsigned int fast_timeout_us,
-				 const unsigned int slow_timeout_ms,
+				 u32 mask,
+				 u32 value,
+				 unsigned int fast_timeout_us,
+				 unsigned int slow_timeout_ms,
 				 u32 *out_value);
 static inline
 int intel_wait_for_register_fw(struct drm_i915_private *dev_priv,
 			       i915_reg_t reg,
-			       const u32 mask,
-			       const u32 value,
-			       const unsigned int timeout_ms)
+			       u32 mask,
+			       u32 value,
+			       unsigned int timeout_ms)
 {
 	return __intel_wait_for_register_fw(dev_priv, reg, mask, value,
 					    2, timeout_ms, NULL);

drivers/gpu/drm/i915/intel_uncore.c

@@ -1610,10 +1610,10 @@ static int gen6_reset_engines(struct drm_i915_private *dev_priv,
  */
 int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv,
 				 i915_reg_t reg,
-				 const u32 mask,
-				 const u32 value,
-				 const unsigned int fast_timeout_us,
-				 const unsigned int slow_timeout_ms,
+				 u32 mask,
+				 u32 value,
+				 unsigned int fast_timeout_us,
+				 unsigned int slow_timeout_ms,
 				 u32 *out_value)
 {
 	u32 reg_value;
@@ -1651,9 +1651,9 @@ int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv,
  */
 int intel_wait_for_register(struct drm_i915_private *dev_priv,
 			    i915_reg_t reg,
-			    const u32 mask,
-			    const u32 value,
-			    const unsigned long timeout_ms)
+			    u32 mask,
+			    u32 value,
+			    unsigned int timeout_ms)
 {
 
 	unsigned fw =