mb/system76/adl: Disable Intel ME by default

Disable the CSME by default now that S3 is used instead of S0ix.

The CSME will not go into a low power state during S0ix when it is
disabled. This prevents the CPU from reaching C10 and so increases the
power usage during suspend compared to leaving CSME enabled. (This was
measured to be a ~2W different on TGL-U.) In S3, the state of the CSME
doesn't matter because the CPU will be off.

Change-Id: I88c0aebdcc977f3ba9dd8f46a6abfaa7a4ae8eb6
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73354
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>

src/mainboard/system76/adl/cmos.default

@@ -1,3 +1,3 @@
 boot_option=Fallback
 debug_level=Debug
-me_state=Enable
+me_state=Disable