Si4700 tuner: It doesn't like to do i2c while powered off and hangs the bus. Make 'pause' simply be 'mute', allowing tuning during user mute as well as nicer-sounding unmute.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26269 a1c6a512-1295-4272-9138-f99709370657

apps/radio/radio.c

@@ -279,7 +279,9 @@ void radio_pause(void)
     }
 
     tuner_set(RADIO_MUTE, 1);
-    tuner_set(RADIO_SLEEP, 1);
+    /* For si4700: 2==this is really 'pause'. other tuners treat it
+     * like 'bool'. */
+    tuner_set(RADIO_SLEEP, 2);
 
     radio_status = FMRADIO_PAUSED;
 } /* radio_pause */

firmware/drivers/tuner/si4700.c

@@ -411,7 +411,9 @@ int si4700_set(int setting, int value)
     switch(setting)
     {
         case RADIO_SLEEP:
+            if (value != 2)
                 si4700_sleep(value);
+            /* else actually it's 'pause' */
             break;
 
         case RADIO_FREQUENCY: