[POWERPC] RTAS delay, fix module build breaks

Export both news RTAS delay functions, and change the scanlog module to
use the new delay functions.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/rtas.c

@@ -797,6 +797,7 @@ EXPORT_SYMBOL(rtas_call);
 EXPORT_SYMBOL(rtas_data_buf);
 EXPORT_SYMBOL(rtas_data_buf_lock);
 EXPORT_SYMBOL(rtas_busy_delay_time);
+EXPORT_SYMBOL(rtas_busy_delay);
 EXPORT_SYMBOL(rtas_get_sensor);
 EXPORT_SYMBOL(rtas_get_power_level);
 EXPORT_SYMBOL(rtas_set_power_level);

arch/powerpc/platforms/pseries/scanlog.c

@@ -107,9 +107,9 @@ static ssize_t scanlog_read(struct file *file, char __user *buf,
 			/* Break to sleep default time */
 			break;
 		    default:
-			if (status > 9900 && status <= 9905) {
-				wait_time = rtas_extended_busy_delay_time(status);
-			} else {
+			/* Assume extended busy */
+			wait_time = rtas_busy_delay_time(status);
+			if (!wait_time) {
 				printk(KERN_ERR "scanlog: unknown error from rtas: %d\n", status);
 				return -EIO;
 			}