PCI: dra7xx: Fix error handling when IRQ request fails in probe

Commit d4c7d1a089d6 ("PCI: dwc: dra7xx: Push request_irq()
call to the bottom of probe") moved the IRQ request for
"dra7xx-pcie-main" towards the end of dra7xx_pcie_probe().

However, the error handling does not take into account the
initialization performed by either dra7xx_add_pcie_port() or
dra7xx_add_pcie_ep(), depending on the mode of operation.

Fix the error handling to address this.

Fixes: d4c7d1a089d6 ("PCI: dwc: dra7xx: Push request_irq() call to the bottom of probe")
Link: https://lore.kernel.org/linux-pci/[email protected]
Tested-by: Udit Kumar <[email protected]>
Signed-off-by: Siddharth Vadapalli <[email protected]>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Kevin Hilman <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Cc: [email protected]

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