drm/i915/dsc: Fix PPS register definition macros for 2nd VDSC engine

This patch fixes the PPS4 and PPS5 register definition macros that were
resulting into an incorect MMIO address.

Fixes: 2efbb2f ("i915/dp/dsc: Add DSC PPS register definitions")
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180824014807.14681-1-manasi.d.navare@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -10454,7 +10454,7 @@ enum skl_power_gate {
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_4_PB, \
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_4_PC)
 #define ICL_DSC1_PICTURE_PARAMETER_SET_4(pipe)	_MMIO_PIPE((pipe) - PIPE_B, \
-							   _ICL_DSC0_PICTURE_PARAMETER_SET_4_PB, \
+							   _ICL_DSC1_PICTURE_PARAMETER_SET_4_PB, \
 							   _ICL_DSC1_PICTURE_PARAMETER_SET_4_PC)
 #define  DSC_INITIAL_DEC_DELAY(dec_delay)       ((dec_delay) << 16)
 #define  DSC_INITIAL_XMIT_DELAY(xmit_delay)     ((xmit_delay) << 0)
@@ -10469,7 +10469,7 @@ enum skl_power_gate {
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_5_PB, \
 							   _ICL_DSC0_PICTURE_PARAMETER_SET_5_PC)
 #define ICL_DSC1_PICTURE_PARAMETER_SET_5(pipe)	_MMIO_PIPE((pipe) - PIPE_B, \
-							   _ICL_DSC1_PICTURE_PARAMETER_SET_5_PC, \
+							   _ICL_DSC1_PICTURE_PARAMETER_SET_5_PB, \
 							   _ICL_DSC1_PICTURE_PARAMETER_SET_5_PC)
 #define  DSC_SCALE_DEC_INT(scale_dec)	((scale_dec) << 16)
 #define  DSC_SCALE_INC_INT(scale_inc)		((scale_inc) << 0)