ump_msg: Fix the wrong snd_ump_msg_system_t argument in little-endian

For the little-endian format, the parameters are stored incorrectly
in snd_ump_msg_system_t type.  Swap the both parameter positions to
correct to the right positions.

Fixes: 040356e ("ump: Add helpers to parse / set UMP packet data")
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/ump_msg.h

@@ -157,8 +157,8 @@ typedef struct snd_ump_msg_system {
 	uint8_t parm1;		/**< First parameter */
 	uint8_t parm2;		/**< Second parameter */
 #else
-	uint8_t parm1;		/**< First parameter */
 	uint8_t parm2;		/**< Second parameter */
+	uint8_t parm1;		/**< First parameter */
 	uint8_t status;		/**< Status */
 	uint8_t group:4;	/**< UMP Group */
 	uint8_t type:4;		/**< UMP packet type */