Update Kenwood max CW message size.

rigs/kenwood/ts590.c

@@ -1923,6 +1923,7 @@ struct rig_caps ts590_caps =
     .get_mem =  kenwood_get_mem,
     .vfo_ops = TS590_VFO_OPS,
     .vfo_op =  kenwood_vfo_op,
+    .morse_qsize = 24,
     .hamlib_check_rig_caps = HAMLIB_CHECK_RIG_CAPS
 };
 
@@ -2353,5 +2354,6 @@ struct rig_caps ts590sg_caps =
     .get_mem =  kenwood_get_mem,
     .vfo_ops = TS590_VFO_OPS,
     .vfo_op =  kenwood_vfo_op,
+    .morse_qsize = 24,
     .hamlib_check_rig_caps = HAMLIB_CHECK_RIG_CAPS
 };

rigs/kenwood/ts890s.c

@@ -721,5 +721,6 @@ struct rig_caps ts890s_caps =
     .get_func = ts890_get_func,
     .get_clock = kenwood_get_clock,
     .set_clock = kenwood_set_clock,
+    .morse_qsize = 24,
     .hamlib_check_rig_caps = HAMLIB_CHECK_RIG_CAPS
 };

rigs/kenwood/ts990s.c

@@ -381,6 +381,7 @@ struct rig_caps ts990s_caps =
     .reset =  kenwood_reset,
     .get_clock = kenwood_get_clock,
     .set_clock = kenwood_set_clock,
+    .morse_qsize = 24,
     .hamlib_check_rig_caps = HAMLIB_CHECK_RIG_CAPS
 };