macintosh: change some data types from int to bool

Change the data type of the following variables from int to bool
across all macintosh drivers:

started
slots_started
pm121_started
wf_smu_started

Some of these issues were detected with the help of Coccinelle.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/macintosh/windfarm_pm72.c b/drivers/macintosh/windfarm_pm72.c
index e88cfb3..8330215 100644
--- a/drivers/macintosh/windfarm_pm72.c
+++ b/drivers/macintosh/windfarm_pm72.c
@@ -611,7 +611,7 @@ static void pm72_tick(void)
 	int i, last_failure;
 
 	if (!started) {
-		started = 1;
+		started = true;
 		printk(KERN_INFO "windfarm: CPUs control loops started.\n");
 		for (i = 0; i < nr_chips; ++i) {
 			if (cpu_setup_pid(i) < 0) {