parisc: arch does not need ZONE_DMA

Remove ZONE_DMA remains from parisc so that kernels are build without
ZONE_DMA.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.18-rc6-mm2/arch/parisc/Kconfig
===================================================================
--- linux-2.6.18-rc6-mm2.orig/arch/parisc/Kconfig	2006-09-18 12:52:05.203892680 -0500
+++ linux-2.6.18-rc6-mm2/arch/parisc/Kconfig	2006-09-18 12:55:43.140754129 -0500
@@ -42,9 +42,6 @@ config TIME_LOW_RES
 	depends on SMP
 	default y
 
-config GENERIC_ISA_DMA
-	bool
-
 config GENERIC_HARDIRQS
 	def_bool y
 
Index: linux-2.6.18-rc6-mm2/arch/parisc/mm/init.c
===================================================================
--- linux-2.6.18-rc6-mm2.orig/arch/parisc/mm/init.c	2006-09-18 12:52:05.217565682 -0500
+++ linux-2.6.18-rc6-mm2/arch/parisc/mm/init.c	2006-09-18 12:55:43.153450483 -0500
@@ -808,9 +808,7 @@ void __init paging_init(void)
 	for (i = 0; i < npmem_ranges; i++) {
 		unsigned long zones_size[MAX_NR_ZONES] = { 0, };
 
-		/* We have an IOMMU, so all memory can go into a single
-		   ZONE_DMA zone. */
-		zones_size[ZONE_DMA] = pmem_ranges[i].pages;
+		zones_size[ZONE_NORMAL] = pmem_ranges[i].pages;
 
 #ifdef CONFIG_DISCONTIGMEM
 		/* Need to initialize the pfnnid_map before we can initialize