Fix compile warnings in ic7600.c for MacOS

rigs/icom/ic7600.c

@@ -313,7 +313,11 @@ struct rig_caps ic7600_caps =
     .has_set_parm =  RIG_PARM_SET(IC7600_PARMS),
     .level_gran =
     {
+#define NO_LVL_KEYSPD
+#define NO_LVL_CWPITCH
 #include "level_gran_icom.h"
+#undef NO_LVL_KEYSPD
+#undef NO_LVL_CWPITCH
         [LVL_KEYSPD] = { .min = { .i = 6 }, .max = { .i = 48 }, .step = { .i = 1 } },
         [LVL_CWPITCH] = { .min = { .i = 300 }, .max = { .i = 900 }, .step = { .i = 1 } },
     },

rigs/icom/level_gran_icom.h

@@ -57,6 +57,7 @@ LVL_KEYSPD
         [LVL_ALC]           = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/120.0f } },
 #if !defined(NO_LVL_USB_AF) 
         [LVL_USB_AF]        = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/255.0f } },
+#endif
 #if !defined(NO_LVL_PBT_IN) 
         [LVL_PBT_IN]        = { .min = { .f = .0 },    .max = { .f = 1 },    .step = { .f = 1.0f/255.0f } },
 #endif