lp5523, lp8501: comment improvements

Add some comments that are not obvious from first look at the driver
to lp5523, fix typo in lp8501.
Signed-off-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/leds/leds-lp5523.c

@@ -35,7 +35,15 @@
 
 #include "leds-lp55xx-common.h"
 
-#define LP5523_PROGRAM_LENGTH		32
+#define LP5523_PROGRAM_LENGTH		32	/* bytes */
+/* Memory is used like this:
+   0x00 engine 1 program
+   0x10 engine 2 program
+   0x20 engine 3 program
+   0x30 engine 1 muxing info
+   0x40 engine 2 muxing info
+   0x50 engine 3 muxing info
+*/
 #define LP5523_MAX_LEDS			9
 
 /* Registers */

drivers/leds/leds-lp8501.c

@@ -263,7 +263,7 @@ static void lp8501_firmware_loaded(struct lp55xx_chip *chip)
 	}
 
 	/*
-	 * Program momery sequence
+	 * Program memory sequence
 	 *  1) set engine mode to "LOAD"
 	 *  2) write firmware data into program memory
 	 */