board: st: stm32mp1: Consider USB cable connected when boot device is USB

Always consider USB cable is connected when USB boot device is detected.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 7466e1c..07b1a63 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -199,6 +199,13 @@
 	if (!IS_ENABLED(CONFIG_USB_GADGET_DWC2_OTG))
 		return -ENODEV;
 
+	/*
+	 * In case of USB boot device is detected, consider USB cable is
+	 * connected
+	 */
+	if ((get_bootmode() & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_USB)
+		return true;
+
 	/* if typec stusb160x is present, means DK1 or DK2 board */
 	ret = stusb160x_cable_connected();
 	if (ret >= 0)