broadwell: Add a few bits to finalize step

Added a few bits to set in finalize step from scrubbing BWG
and reference code.

BUG=chrome-os-partner:28234
BRANCH=broadwell
TEST=build and boot on samus

Change-Id: Ia62055b32be039eef84a0f60f0ba307eb5dce6a1
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/239958
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/intel/broadwell/finalize.c b/src/soc/intel/broadwell/finalize.c
index 96ffbdc..506587a 100644
--- a/src/soc/intel/broadwell/finalize.c
+++ b/src/soc/intel/broadwell/finalize.c
@@ -51,6 +51,9 @@
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x6800, 1 << 31),
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x7000, 1 << 31),
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x77fc, 1 << 0),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x50fc, 0x8f),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x7ffc, 1 << 0),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x5880, 1 << 5),
 	REG_MMIO_WRITE8(MCH_BASE_ADDRESS + 0x50fc, 0x8f),	/* MC */
 
 	REG_SCRIPT_END