MAINTAINERS: Add entry for Qualcomm IPQ4019 USB PHY

Add maintainers entry for the Qualcomm IPQ4019 USB PHY driver.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Link: https://lore.kernel.org/r/20201016204610.2406075-1-robert.marko@sartura.hr


Signed-off-by: Vinod Koul <vkoul@kernel.org>