phy: cpcap-usb: Use IRQF_ONESHOT

Fixes coccicheck error:

./drivers/phy/motorola/phy-cpcap-usb.c:365:9-34: ERROR:
Threaded IRQ with no primary handler requested without IRQF_ONESHOT

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Link: https://lore.kernel.org/r/1603875549-107500-1-git-send-email-zou_wei@huawei.com


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