mtd: rawnand: tegra: add missing check for platform_get_irq()

Add the missing check for platform_get_irq() and return error code
if it fails.

Fixes: d7d9f8ec ("mtd: rawnand: add NVIDIA Tegra NAND Flash controller driver")
Signed-off-by: Yi Yang <yiyang13@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230821084046.217025-1-yiyang13@huawei.com