ARM: OMAP: Remove old PM_SUSPEND_DISK

Remove old PM_SUSPEND_DISK. Also some minor cosmetic
clean-up.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/pm.c

-//kernel/linux-omap-fsample/arch/arm/mach-omap1/pm.c#3 - integrate change 4545 (text)
 /*
  * linux/arch/arm/mach-omap1/pm.c
  *
@@ -631,10 +630,6 @@ static int omap_pm_prepare(suspend_state_t state)
 	case PM_SUSPEND_STANDBY:
 	case PM_SUSPEND_MEM:
 		break;
-
-	case PM_SUSPEND_DISK:
-		return -ENOTSUPP;
-
 	default:
 		return -EINVAL;
 	}
@@ -657,10 +652,6 @@ static int omap_pm_enter(suspend_state_t state)
 	case PM_SUSPEND_MEM:
 		omap_pm_suspend();
 		break;
-
-	case PM_SUSPEND_DISK:
-		return -ENOTSUPP;
-
 	default:
 		return -EINVAL;
 	}