drm/i915: Eliminate weird parameter inversion from BXT PPS registers

v2: Keep using the same registers (PCH_*) instead of accidentally
    starting to use the other ones (BXT_*)2) (Jesse)

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_reg.h

@@ -6587,10 +6587,10 @@ enum skl_disp_power_wells {
 #define _BXT_PP_ON_DELAYS2	0xc7308
 #define _BXT_PP_OFF_DELAYS2	0xc730c
 
-#define BXT_PP_STATUS(n)	((!n) ? PCH_PP_STATUS : _BXT_PP_STATUS2)
-#define BXT_PP_CONTROL(n)	((!n) ? PCH_PP_CONTROL : _BXT_PP_CONTROL2)
-#define BXT_PP_ON_DELAYS(n)	((!n) ? PCH_PP_ON_DELAYS : _BXT_PP_ON_DELAYS2)
-#define BXT_PP_OFF_DELAYS(n)	((!n) ? PCH_PP_OFF_DELAYS : _BXT_PP_OFF_DELAYS2)
+#define BXT_PP_STATUS(n)	_PIPE(n, PCH_PP_STATUS, _BXT_PP_STATUS2)
+#define BXT_PP_CONTROL(n)	_PIPE(n, PCH_PP_CONTROL, _BXT_PP_CONTROL2)
+#define BXT_PP_ON_DELAYS(n)	_PIPE(n, PCH_PP_ON_DELAYS, _BXT_PP_ON_DELAYS2)
+#define BXT_PP_OFF_DELAYS(n)	_PIPE(n, PCH_PP_OFF_DELAYS, _BXT_PP_OFF_DELAYS2)
 
 #define PCH_DP_B		0xe4100
 #define PCH_DPB_AUX_CH_CTL	0xe4110