[POWERPC] Platforms shouldn't mess with ROOT_DEV

There is no good reason for board platform code to mess with the
ROOT_DEV.  Remove it from all in-tree platforms except powermac.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/52xx/efika.c

@@ -197,15 +197,6 @@ static void __init efika_setup_arch(void)
 {
 	rtas_initialize();
 
-#ifdef CONFIG_BLK_DEV_INITRD
-	initrd_below_start_ok = 1;
-
-	if (initrd_start)
-		ROOT_DEV = Root_RAM0;
-	else
-#endif
-		ROOT_DEV = Root_SDA2;	/* sda2 (sda1 is for the kernel) */
-
 	efika_pcisetup();
 
 #ifdef CONFIG_PM

arch/powerpc/platforms/cell/setup.c

@@ -171,11 +171,6 @@ static void __init cell_setup_arch(void)
 	/* init to some ~sane value until calibrate_delay() runs */
 	loops_per_jiffy = 50000000;
 
-	if (ROOT_DEV == 0) {
-		printk("No ramdisk, default root is /dev/hda2\n");
-		ROOT_DEV = Root_HDA2;
-	}
-
 	/* Find and initialize PCI host bridges */
 	init_pci_config_tokens();
 	find_and_init_phbs();

arch/powerpc/platforms/celleb/setup.c

@@ -101,11 +101,6 @@ static void __init celleb_setup_arch(void)
 	/* init to some ~sane value until calibrate_delay() runs */
 	loops_per_jiffy = 50000000;
 
-	if (ROOT_DEV == 0) {
-		printk("No ramdisk, default root is /dev/hda2\n");
-		ROOT_DEV = Root_HDA2;
-	}
-
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif

arch/powerpc/platforms/chrp/setup.c

@@ -290,16 +290,6 @@ void __init chrp_setup_arch(void)
 		ppc_md.set_rtc_time	= rtas_set_rtc_time;
 	}
 
-#ifdef CONFIG_BLK_DEV_INITRD
-	/* this is fine for chrp */
-	initrd_below_start_ok = 1;
-
-	if (initrd_start)
-		ROOT_DEV = Root_RAM0;
-	else
-#endif
-		ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
-
 	/* On pegasos, enable the L2 cache if not already done by OF */
 	pegasos_set_l2cr();
 

arch/powerpc/platforms/pseries/setup.c

@@ -257,11 +257,6 @@ static void __init pSeries_setup_arch(void)
 	/* init to some ~sane value until calibrate_delay() runs */
 	loops_per_jiffy = 50000000;
 
-	if (ROOT_DEV == 0) {
-		printk("No ramdisk, default root is /dev/sda2\n");
-		ROOT_DEV = Root_SDA2;
-	}
-
 	fwnmi_init();
 
 	/* Find and initialize PCI host bridges */