pwm: add period and polarity to struct pwm_lookup

Add period and polarity members to struct pwm_lookup so that platforms
using the lookup table can be treated the same way as those using the
device tree.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 4717f54..2f45e2f 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -274,6 +274,8 @@
 	unsigned int index;
 	const char *dev_id;
 	const char *con_id;
+	unsigned int period;
+	enum pwm_polarity polarity;
 };
 
 #define PWM_LOOKUP(_provider, _index, _dev_id, _con_id)	\