drm/i915: Rename intel_encoder->enc to base for consistency

[Patch is slightly larger than is strictly necessary to fixup
surrounding checkpatch.pl errors.]

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index b454d1a..454bcf3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -137,7 +137,7 @@
 };
 
 struct intel_encoder {
-	struct drm_encoder enc;
+	struct drm_encoder base;
 	int type;
 	struct i2c_adapter *i2c_bus;
 	struct i2c_adapter *ddc_bus;
@@ -174,7 +174,7 @@
 
 #define to_intel_crtc(x) container_of(x, struct intel_crtc, base)
 #define to_intel_connector(x) container_of(x, struct intel_connector, base)
-#define enc_to_intel_encoder(x) container_of(x, struct intel_encoder, enc)
+#define to_intel_encoder(x) container_of(x, struct intel_encoder, base)
 #define to_intel_framebuffer(x) container_of(x, struct intel_framebuffer, base)
 
 struct intel_unpin_work {