drm/i915: pass dev_priv explicitly to TRANS_VRR_VTOTAL_PREV

Avoid the implicit dev_priv local variable use, and pass dev_priv
explicitly to the TRANS_VRR_VTOTAL_PREV register macro.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/de2c305ffef3df1112234baeae944b8dc84d0707.1715183162.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_reg.h

@@ -1291,7 +1291,7 @@
 #define _TRANS_VRR_VTOTAL_PREV_B	0x61480
 #define _TRANS_VRR_VTOTAL_PREV_C	0x62480
 #define _TRANS_VRR_VTOTAL_PREV_D	0x63480
-#define TRANS_VRR_VTOTAL_PREV(trans)	_MMIO_TRANS2(dev_priv, trans, \
+#define TRANS_VRR_VTOTAL_PREV(dev_priv, trans)	_MMIO_TRANS2(dev_priv, trans, \
 					_TRANS_VRR_VTOTAL_PREV_A)
 #define   VRR_VTOTAL_FLIP_BEFR_BNDR	REG_BIT(31)
 #define   VRR_VTOTAL_FLIP_AFTER_BNDR	REG_BIT(30)