media: netup_unidvb: fix irq init by register it at the end of probe

media: netup_unidvb: fix irq init by register it at the end of probe

IRQ handler netup_spi_interrupt() takes spinlock spi->lock. The lock
is initialized in netup_spi_init(). However, irq handler is registered
before initializing the lock.

Spinlock dma->lock and i2c->lock suffer from the same problem.

Fix this by registering the irq at the end of probe.

Link: https://lore.kernel.org/linux-media/20230315134518.1074497-1-harperchen1110@gmail.com
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>