arm64: dts: uniphier: Fix USB interrupts for PXs3 SoC

An interrupt for USB device are shared with USB host. Set interrupt-names
property to common "dwc_usb3" instead of "host" and "peripheral".

Cc: stable@vger.kernel.org
Fixes: d7b9beb8

 ("arm64: dts: uniphier: Add USB3 controller nodes")
Reported-by: Ryuta NAKANISHI <nakanishi.ryuta@socionext.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>