Monroe: Disable KB/MS in ITE8772.

BRANCH=firmware-monroe-4921.B
BUG=chrome-os-partner:33045
TEST=Build an image, run on monroe and confirm the I/O 60h/64h read
cycle is aborted with 0xff returned.
Signed-off-by: Kenji Chen <kenji.chen@intel.com>

Change-Id: Iba8b6b3e4b3520df9e5e7d5fa548cc32eeea1ad1
Reviewed-on: https://chromium-review.googlesource.com/226708
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Shawn Nematbakhsh <shawnn@chromium.org>
Commit-Queue: Kenji Chen <kenji.chen@intel.com>
Tested-by: Kenji Chen <kenji.chen@intel.com>
diff --git a/src/mainboard/google/monroe/devicetree.cb b/src/mainboard/google/monroe/devicetree.cb
index 31b0d6f..dfe44af 100644
--- a/src/mainboard/google/monroe/devicetree.cb
+++ b/src/mainboard/google/monroe/devicetree.cb
@@ -121,12 +121,12 @@
 						io 0x60 = 0x720
 						io 0x62 = 0x730
 					end
-					device pnp 2e.5 on
+					device pnp 2e.5 off
 						io 0x60 = 0x60
 						io 0x62 = 0x64
 						irq 0x70 = 1
 					end # Keyboard
-					device pnp 2e.6 on
+					device pnp 2e.6 off
 						irq 0x70 = 12
 					end # Mouse
 					device pnp 2e.a off end # IR