Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/media/dvb/frontends/au8522_dig.c b/drivers/media/dvb/frontends/au8522_dig.c
index 65f6a36..1d57294 100644
--- a/drivers/media/dvb/frontends/au8522_dig.c
+++ b/drivers/media/dvb/frontends/au8522_dig.c
@@ -635,7 +635,7 @@
 	struct au8522_led_config *led_config = state->config->led_cfg;
 	u8 val;
 
-	/* bail out if we cant control an LED */
+	/* bail out if we can't control an LED */
 	if (!led_config || !led_config->gpio_output ||
 	    !led_config->gpio_output_enable || !led_config->gpio_output_disable)
 		return 0;
@@ -665,7 +665,7 @@
 	struct au8522_led_config *led_config = state->config->led_cfg;
 	int i, ret = 0;
 
-	/* bail out if we cant control an LED */
+	/* bail out if we can't control an LED */
 	if (!led_config || !led_config->gpio_leds ||
 	    !led_config->num_led_states || !led_config->led_states)
 		return 0;
@@ -803,7 +803,7 @@
 	int led;
 	u16 strong;
 
-	/* bail out if we cant control an LED */
+	/* bail out if we can't control an LED */
 	if (!led_config)
 		return 0;