media: atomisp: Replace deprecated MSI APIs

Replace deprecated MSI IRQ enabler and disabler
with pci_alloc_irq_vectors and pci_free_irq_vectors respectively.
And as a result handle the returned error as appropriate.
Compile tested.

[mchehab: solved a merge conflict that renamed dev->pdev]

Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>