arm64: dts: qcom: sdm845-db845c: Add pm_8998 gpio names

Add pm_8998 GPIO trace names. These names are defined in
the 96boards db845c mezzanine schematic.
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200324155843.10719-5-robert.foss@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm845-db845c.dts

@@ -412,6 +412,34 @@ &pcie1_phy {
 };
 
 &pm8998_gpio {
+	gpio-line-names =
+		"NC",
+		"NC",
+		"WLAN_SW_CTRL",
+		"NC",
+		"PM_GPIO5_BLUE_BT_LED",
+		"VOL_UP_N",
+		"NC",
+		"ADC_IN1",
+		"PM_GPIO9_YEL_WIFI_LED",
+		"CAM0_AVDD_EN",
+		"NC",
+		"CAM0_DVDD_EN",
+		"PM_GPIO13_GREEN_U4_LED",
+		"DIV_CLK2",
+		"NC",
+		"NC",
+		"NC",
+		"SMB_STAT",
+		"NC",
+		"NC",
+		"ADC_IN2",
+		"OPTION1",
+		"WCSS_PWR_REQ",
+		"PM845_GPIO24",
+		"OPTION2",
+		"PM845_SLB";
+
 	vol_up_pin_a: vol-up-active {
 		pins = "gpio6";
 		function = "normal";