pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members

Now that PWM_LOOKUP is not used anymore, modify it to initialize all the
members of struct pwm_lookup.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

Documentation/pwm.txt

@@ -19,7 +19,8 @@ should instead register a static mapping that can be used to match PWM
 consumers to providers, as given in the following example:
 
 	static struct pwm_lookup board_pwm_lookup[] = {
-		PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL),
+		PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL,
+			   50000, PWM_POLARITY_NORMAL),
 	};
 
 	static void __init board_init(void)

include/linux/pwm.h

@@ -278,12 +278,14 @@ struct pwm_lookup {
 	enum pwm_polarity polarity;
 };
 
-#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id)	\
+#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id, _period, _polarity) \
 	{						\
 		.provider = _provider,			\
 		.index = _index,			\
 		.dev_id = _dev_id,			\
 		.con_id = _con_id,			\
+		.period = _period,			\
+		.polarity = _polarity			\
 	}
 
 #if IS_ENABLED(CONFIG_PWM)