pwm: cros_ec: Rename "priv_auto_alloc_size" to "priv_auto"

With commit 41575d8e4c ("dm: treewide: Rename auto_alloc_size members
to be shorter") "priv_auto_alloc_size" was renamed to "priv_auto". This
driver was sent to the mailing list before that change, merged after it,
and still has the old form. Apply the rename here as well.

Fixes: 1b9ee2882e ("pwm: Add a driver for Chrome OS EC PWM")
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/pwm/cros_ec_pwm.c

@@ -80,5 +80,5 @@ U_BOOT_DRIVER(cros_ec_pwm) = {
 	.id	= UCLASS_PWM,
 	.of_match = cros_ec_pwm_ids,
 	.ops	= &cros_ec_pwm_ops,
-	.priv_auto_alloc_size	= sizeof(struct cros_ec_pwm_priv),
+	.priv_auto = sizeof(struct cros_ec_pwm_priv),
 };