drm/i915: Clean up SDVO pipe select bits

Clean up the SDVO pipe select bits. To make the whole situation a bit
less ugly we'll start to share the same code between .get_hw_state()
and the port state asserts.

v2: Order the defines shift,mask,value (Jani)

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180514172423.9302-3-ville.syrjala@linux.intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 753b8f1..f1c8323 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4297,9 +4297,9 @@ enum {
 
 /* Gen 3 SDVO bits: */
 #define   SDVO_ENABLE				(1 << 31)
-#define   SDVO_PIPE_SEL(pipe)			((pipe) << 30)
+#define   SDVO_PIPE_SEL_SHIFT			30
 #define   SDVO_PIPE_SEL_MASK			(1 << 30)
-#define   SDVO_PIPE_B_SELECT			(1 << 30)
+#define   SDVO_PIPE_SEL(pipe)			((pipe) << 30)
 #define   SDVO_STALL_SELECT			(1 << 29)
 #define   SDVO_INTERRUPT_ENABLE			(1 << 26)
 /*
@@ -4339,12 +4339,14 @@ enum {
 #define   SDVOB_HOTPLUG_ENABLE			(1 << 23) /* SDVO only */
 
 /* Gen 6 (CPT) SDVO/HDMI bits: */
-#define   SDVO_PIPE_SEL_CPT(pipe)		((pipe) << 29)
+#define   SDVO_PIPE_SEL_SHIFT_CPT		29
 #define   SDVO_PIPE_SEL_MASK_CPT		(3 << 29)
+#define   SDVO_PIPE_SEL_CPT(pipe)		((pipe) << 29)
 
 /* CHV SDVO/HDMI bits: */
-#define   SDVO_PIPE_SEL_CHV(pipe)		((pipe) << 24)
+#define   SDVO_PIPE_SEL_SHIFT_CHV		24
 #define   SDVO_PIPE_SEL_MASK_CHV		(3 << 24)
+#define   SDVO_PIPE_SEL_CHV(pipe)		((pipe) << 24)
 
 
 /* DVO port control */