mb/google/brox/var/jubilant: Apply fw_config to enable/disable I2C1

As a result of hardware BOM design, U51 (power gate for touchscreen)
would be required to remove on non-touch SKU. The change will cause
the I2C1 touchscreen devices probe ERROR of non-touch SKU since no
power for I2C bus pull-high resistors.The ERROR is waiting I2C stop
condition time out then bootperf test will get fail.

The CL apply fw_config field 19 - PANEL_PWR_SEQ_CTRL for I2C1:
0...disable (non-touch sku)
1...enable  (touch sku)
Turn off I2C1 for non-touch sku, and keep I2C1 is on for touch sku.
It will avoid the touchscreen probing error on I2c1.

BUG=b:447513390
TEST=Check boot to kernel time is 1,376 sec under spec and without
      I2C probe error in ap log of non-touch sku.
     Check touchscreen device works well of touch sku.

Change-Id: I72a68177a90cea88fe283d8499b8378c64206fa2
Signed-off-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89591
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: David Wu <david_wu@quanta.corp-partner.google.com>

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

@@ -16,6 +16,10 @@ fw_config
 		option FPMCU_ABSENT			0
 		option FPMCU_NUVOTON			1
 	end
+	field PANEL_PWR 19
+		option DISABLE				0
+		option ENABLE				1
+	end
 end
 
 chip soc/intel/alderlake
@@ -402,6 +406,7 @@ chip soc/intel/alderlake
 				register "hid_desc_reg_offset" = "0x01"
 				device i2c 10 on end
 			end
+			probe PANEL_PWR ENABLE
 		end
 		device ref i2c2 on
 			chip drivers/i2c/generic