Panther: Disable KB/MS in ITE8772.

BRANCH=firmware-panther-4920.24.B
BUG=None
TEST=Build an image, run on panther 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: Ie560963367796bcefdfa8e1e0be1157fcb07e7d9
Reviewed-on: https://chromium-review.googlesource.com/226742
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/panther/devicetree.cb b/src/mainboard/google/panther/devicetree.cb
index d37b622..9eeb291 100644
--- a/src/mainboard/google/panther/devicetree.cb
+++ b/src/mainboard/google/panther/devicetree.cb
@@ -123,12 +123,12 @@
 						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