led: Add doc strings

src/fbd-dev-led-multicolor.c

@@ -24,7 +24,7 @@
 /**
  * fbd-dev-led-multicolor:
  *
- * A multicolor led using the kernels "multi_intensitiy"
+ * A multicolor led using the `multi_intensitiy` sysfs attribute
  */
 typedef struct _FbdDevLedMulticolorPrivate {
   guint               red_index;

src/fbd-dev-led.c

@@ -30,6 +30,11 @@ enum {
 };
 static GParamSpec *props[PROP_LAST_PROP];
 
+/**
+ * FbdDevLed:
+ *
+ * A single color LED driven by Linux sysfs
+ */
 typedef struct _FbdDevLedPrivate {
   GUdevDevice        *dev;
   guint               max_brightness;