drm/i915/cnl: LSPCON support is gen9+

There is no platform specific change needed for LSPCON
support on Cannonlake. So let's make it gen9+.

Cc: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NShashank Sharma <shashank.sharma@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1497047175-27250-17-git-send-email-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -3002,7 +3002,7 @@ intel_info(const struct drm_i915_private *dev_priv)
 
 #define HAS_GMCH_DISPLAY(dev_priv) ((dev_priv)->info.has_gmch_display)
 
-#define HAS_LSPCON(dev_priv) (IS_GEN9(dev_priv))
+#define HAS_LSPCON(dev_priv) (INTEL_GEN(dev_priv) >= 9)
 
 /* DPF == dynamic parity feature */
 #define HAS_L3_DPF(dev_priv) ((dev_priv)->info.has_l3_dpf)