sparc64: Simplify error handling in PCI controller probing.

Based upon suggestions from Stephen Rothwell.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc arch/sparc64/kernel/pci_fire.c
Simple merge

diff --cc arch/sparc64/kernel/pci_psycho.c
Simple merge

diff --cc arch/sparc64/kernel/pci_sabre.c
Simple merge

diff --cc arch/sparc64/kernel/pci_schizo.c
Simple merge

diff --cc arch/sparc64/kernel/pci_sun4v.c
Simple merge