phy: add driver for Qualcomm IPQ40xx USB PHY

Add a driver to setup the USB PHY-s on Qualcomm IPQ40xx series SoCs.
The driver sets up HS and SS phys.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>
diff --git a/MAINTAINERS b/MAINTAINERS
index fcad3e4..1ba7109 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -240,6 +240,7 @@
 F:	include/dt-bindings/clock/qcom,ipq4019-gcc.h
 F:	include/dt-bindings/reset/qcom,ipq4019-reset.h
 F:	drivers/reset/reset-ipq4019.c
+F:	drivers/phy/phy-qcom-ipq4019-usb.c
 
 ARM MARVELL KIRKWOOD ARMADA-XP ARMADA-38X ARMADA-37XX ARMADA-7K/8K
 M:	Stefan Roese <sr@denx.de>