MIPS: IP27: Remove pfn_t.

In the Linux kernel traditionally pfns are represented by an unsigned long.
However a few bits of the SGI IP27 platform code that were ported from
IRIX are using pfn_t for historic reasons.  This is conflicting with
KVM's use of pfn_t.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/sgi-ip27/ip27-klnuma.c b/arch/mips/sgi-ip27/ip27-klnuma.c
index 1d1919a..7a53b1e 100644
--- a/arch/mips/sgi-ip27/ip27-klnuma.c
+++ b/arch/mips/sgi-ip27/ip27-klnuma.c
@@ -114,7 +114,7 @@
  * data structures on the first couple of pages of the first slot of each
  * node. If this is the case, getfirstfree(node) > getslotstart(node, 0).
  */
-pfn_t node_getfirstfree(cnodeid_t cnode)
+unsigned long node_getfirstfree(cnodeid_t cnode)
 {
 	unsigned long loadbase = REP_BASE;
 	nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);