[PATCH] ppc64: Fix G5 build with DART (iommu) support

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

A recent patch that cleaned up some absolute/virt translation macros forgot
one occurence, thus breaking g5 build with iommu support.

arch/ppc64/kernel/prom.c

@@ -798,7 +798,7 @@ void prom_initialize_dart_table(void)
 	 * will blow up an entire large page anyway in the kernel mapping
 	 */
 	RELOC(dart_tablebase) =
-		absolute_to_virt(lmb_alloc_base(1UL<<24, 1UL<<24, 0x80000000L));
+		abs_to_virt(lmb_alloc_base(1UL<<24, 1UL<<24, 0x80000000L));
 
 	prom_print(RELOC("Dart at: "));
 	prom_print_hex(RELOC(dart_tablebase));