usb: host: ehci-sh: propagate errors from platform_get_irq()

The driver overrides the error codes and IRQ0 returned by platform_get_irq()
to -ENODEV.  Switch to propagating the error codes upstream.  IRQ0 is no
longer returned by platform_get_irq(), so we now can safely ignore it...

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/20211214204247.7172-4-s.shtylyov@omp.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>