[POWERPC] Remove empty ppc_md.setup_arch hooks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/40x/virtex.c

@@ -36,14 +36,9 @@ static int __init virtex_probe(void)
 	return 1;
 }
 
-static void __init virtex_setup_arch(void)
-{
-}
-
 define_machine(virtex) {
 	.name			= "Xilinx Virtex",
 	.probe			= virtex_probe,
-	.setup_arch		= virtex_setup_arch,
 	.init_IRQ		= xilinx_intc_init_tree,
 	.get_irq		= xilinx_intc_get_irq,
 	.calibrate_decr		= generic_calibrate_decr,

arch/powerpc/platforms/40x/walnut.c

@@ -53,14 +53,9 @@ static int __init walnut_probe(void)
 	return 1;
 }
 
-static void __init walnut_setup_arch(void)
-{
-}
-
 define_machine(walnut) {
 	.name			= "Walnut",
 	.probe			= walnut_probe,
-	.setup_arch		= walnut_setup_arch,
 	.progress		= udbg_progress,
 	.init_IRQ		= uic_init_tree,
 	.get_irq		= uic_get_irq,

arch/powerpc/platforms/44x/bamboo.c

@@ -50,14 +50,9 @@ static int __init bamboo_probe(void)
 	return 1;
 }
 
-static void __init bamboo_setup_arch(void)
-{
-}
-
 define_machine(bamboo) {
 	.name 				= "Bamboo",
 	.probe 				= bamboo_probe,
-	.setup_arch 		= bamboo_setup_arch,
 	.progress 			= udbg_progress,
 	.init_IRQ 			= uic_init_tree,
 	.get_irq 			= uic_get_irq,

arch/powerpc/platforms/44x/ebony.c

@@ -57,14 +57,9 @@ static int __init ebony_probe(void)
 	return 1;
 }
 
-static void __init ebony_setup_arch(void)
-{
-}
-
 define_machine(ebony) {
 	.name			= "Ebony",
 	.probe			= ebony_probe,
-	.setup_arch		= ebony_setup_arch,
 	.progress		= udbg_progress,
 	.init_IRQ		= uic_init_tree,
 	.get_irq		= uic_get_irq,

arch/powerpc/platforms/44x/sequoia.c

@@ -50,14 +50,9 @@ static int __init sequoia_probe(void)
 	return 1;
 }
 
-static void __init sequoia_setup_arch(void)
-{
-}
-
 define_machine(sequoia) {
 	.name 				= "Sequoia",
 	.probe 				= sequoia_probe,
-	.setup_arch			= sequoia_setup_arch,
 	.progress 			= udbg_progress,
 	.init_IRQ 			= uic_init_tree,
 	.get_irq 			= uic_get_irq,