drm/i915/gen9+: Remove redundant power well state assert during enabling

We check already for power wells that are unexpectedly on (or forced on)
during power well disabling. Those checks also account for other
power well requesters like KVMR or DEBUG. As such this check is
redundant, let's remove it to simplify things.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1499352040-8819-9-git-send-email-imre.deak@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -852,13 +852,8 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
 		skl_power_well_pre_disable(dev_priv, power_well);
 
 	if (enable) {
-		if (!enable_requested) {
-			WARN((tmp & state_mask) &&
-				!I915_READ(HSW_PWR_WELL_BIOS),
-				"Invalid for power well status to be enabled, unless done by the BIOS, \
-				when request is to disable!\n");
+		if (!enable_requested)
 			I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask);
-		}
 
 		if (!is_enabled) {
 			DRM_DEBUG_KMS("Enabling %s\n", power_well->name);