powerpc/pseries: Fix typo in VPHN comments

Correct a spelling error in VPHN comments in numa.c.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index bf5cb91..4d7f9e7 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1289,7 +1289,7 @@
 }
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
-/* Vrtual Processor Home Node (VPHN) support */
+/* Virtual Processor Home Node (VPHN) support */
 #ifdef CONFIG_PPC_SPLPAR
 #define VPHN_NR_CHANGE_CTRS (8)
 static u8 vphn_cpu_change_counts[NR_CPUS][VPHN_NR_CHANGE_CTRS];