mb/google/zork: correct USB2 phy TXVREFTUNE0 parameter name

From spec, [31:28] "HS DC Voltage Level Adjustment" is "TXVREFTUNE0".
correct rx_vref_tune -> tx_vref_tune

BUG=None
BRANCH=zork
TEST=emerge-zork coreboot

Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Change-Id: I27003a952d8f8bdd8fe52af8a37010e23ee9cdfd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47735
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb b/src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
index 9f5ef0c..0b64855 100644
--- a/src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
+++ b/src/mainboard/google/zork/variants/baseboard/devicetree_dalboz.cb
@@ -64,7 +64,7 @@
 		.tx_pre_emp_amp_tune = 0x03,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x6,
+		.tx_vref_tune = 0x6,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"
@@ -77,7 +77,7 @@
 		.tx_pre_emp_amp_tune = 0x03,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x6,
+		.tx_vref_tune = 0x6,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"
@@ -90,7 +90,7 @@
 		.tx_pre_emp_amp_tune = 0x03,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x6,
+		.tx_vref_tune = 0x6,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"
@@ -103,7 +103,7 @@
 		.tx_pre_emp_amp_tune = 0x03,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x6,
+		.tx_vref_tune = 0x6,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"
@@ -116,7 +116,7 @@
 		.tx_pre_emp_amp_tune = 0x02,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x5,
+		.tx_vref_tune = 0x5,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"
@@ -129,7 +129,7 @@
 		.tx_pre_emp_amp_tune = 0x02,
 		.tx_pre_emp_pulse_tune = 0x0,
 		.tx_rise_tune = 0x1,
-		.rx_vref_tune = 0x5,
+		.tx_vref_tune = 0x5,
 		.tx_hsxv_tune = 0x3,
 		.tx_res_tune = 0x01,
 	}"