mb/system76/adl-p: Disable SATA DevSlp

After changing EC detection of S0ix from CPU_C10_GATE# to SLP_S0# in
system76/ec@cc3effb6a451 ("board/system76/common: use SLP_S0# pin for
modern standby detection"), DevSlp blocks suspend entry. Disable it
until it is fixed.

Change-Id: I586245ebf9f9d5ad08f6745a450411f194a661da
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70100
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>
diff --git a/src/mainboard/system76/adl-p/devicetree.cb b/src/mainboard/system76/adl-p/devicetree.cb
index 6a9f362..c7085b4 100644
--- a/src/mainboard/system76/adl-p/devicetree.cb
+++ b/src/mainboard/system76/adl-p/devicetree.cb
@@ -73,7 +73,8 @@
 		device ref sata on
 			register "sata_salp_support" = "1"
 			register "sata_ports_enable[1]" = "1" # SSD1
-			register "sata_ports_dev_slp[1]" = "1" # GPP_H12 (SATA1_DEVSLP1)
+			# FIXME: DevSlp breaks S0ix
+			#register "sata_ports_dev_slp[1]" = "1" # GPP_H12 (SATA1_DEVSLP1)
 		end
 		device ref pch_espi on
 			register "gen1_dec" = "0x00040069" # EC PM channel