remove unused case conversion & add -mtune=cortex-a9 to Makefile

Makefile

@@ -1,6 +1,6 @@
 CC=arm-linux-gnueabihf-gcc 
 STRIP=arm-linux-gnueabihf-strip 
-CCFLAGS=-Ialsa/include -Lalsa/lib -Ofast -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=hard -ftree-vectorize -funsafe-math-optimizations
+CCFLAGS=-Ialsa/include -Lalsa/lib -Ofast -mcpu=cortex-a9 -mtune=cortex-a9 -mfpu=neon -mfloat-abi=hard -ftree-vectorize -funsafe-math-optimizations
 LDFLAGS=-lasound -lm -pthread 
 all : 
 	$(CC) $(CCFLAGS) $(LDFLAGS) main.c modem.c serial.c serial2.c misc.c udpsock.c tcpsock.c alsa.c ini.c directory.c modem_snd.c -o midilink

misc.c

@@ -173,8 +173,6 @@ void misc_swrite_no_trans(int fdSerial, const char* format, ... )
 int misc_check_args_option (int argc, char *argv[], char * option)
 {
     int result = FALSE;
-    char * OPTION = strdup(option);
-    misc_str_to_upper(OPTION);
     if(argc > 1)
         for (int i = 1; i< argc; i++)
         {
@@ -184,7 +182,6 @@ int misc_check_args_option (int argc, char *argv[], char * option)
                 break;
             }
         }
-    free(OPTION);
     return result;
 }