mb/google/brox/var/lotso: Update DTT settings for thermal control

Update DTT settings according to b:348285763#comment20 in
order to increase the limit of the charging current to 3A.

BUG=b:348285763
TEST=emerge-brox coreboot, and thermal engineer verifies OK.

Change-Id: I24978afd819666f635c85f2be9b71d39e0a39f27
Signed-off-by: Kun Liu <liukun11@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84527
Reviewed-by: Jian Tong <tongjian@huaqin.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brox/variants/lotso/overridetree.cb

@@ -159,9 +159,9 @@ chip soc/intel/alderlake
 
 				## Charger Performance Control (Control, mA)
 				register "controls.charger_perf" = "{
-						[0] = { 255, 1700 },
-						[1] = {  24, 1500 },
-						[2] = {  16, 1000 },
+						[0] = { 255, 4200 },
+						[1] = {  48, 3000 },
+						[2] = {  32, 2000 },
 						[3] = {   8,  500 }
 				}"