mb/system76/adl-p: lemp11: Fix power config

lemp11 is ADL-U, not ADL-P. Use the correct ID to override the values
and reduce PL1 to the TDP of 15W.

Change-Id: I285c906dc08d2882e6e84b463a63b69966b3c9f5
Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/mainboard/system76/adl-p/variants/lemp11/overridetree.cb

@@ -1,6 +1,6 @@
 chip soc/intel/alderlake
-	register "power_limits_config[ADL_P_282_482_28W_CORE]" = "{
-		.tdp_pl1_override = 20,
+	register "power_limits_config[ADL_P_142_242_282_15W_CORE]" = "{
+		.tdp_pl1_override = 15,
 		.tdp_pl2_override = 46,
 		.tdp_pl4 = 65,
 	}"