PCI: dra7xx: Fix dra7xx_pcie_cpu_addr_fixup() parameter name

PCI: dra7xx: Fix dra7xx_pcie_cpu_addr_fixup() parameter name

The function pointer declaration for the cpu_addr_fixup() callback uses
"cpu_addr" as parameter name.

Likewise, the argument that is supplied to the function pointer when the
function is actually called is "cpu_addr".

Rename the dra7xx_pcie_cpu_addr_fixup() function parameter name to match
reality.

[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20240430071054.248008-3-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>