[SPARC64] pci_sun4v.c: Section fixes.

WARNING: vmlinux.o(.text+0x39be4): Section mismatch in reference from the function probe_existing_entries() to the function .init.text:page_in_phys_avail()

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>