trivial: PWM: fix of #endif comment

Signed-off-by: Mark Vels <mark.vels@team-embedded.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 3945f80..7c77575 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -28,4 +28,4 @@
  */
 void pwm_disable(struct pwm_device *pwm);
 
-#endif /* __ASM_ARCH_PWM_H */
+#endif /* __LINUX_PWM_H */