fpga_io, user_io, minimig: Remove unreferenced printf arguments

Remove arguments to *printf that were not being referenced by the format
strings.

fpga_io.cpp

@@ -486,7 +486,7 @@ int fpga_load_rbf(const char *name, const char *cfg)
 			{
 				if (read(rbf, buf, st.st_size)<st.st_size)
 				{
-					printf("Couldn't read file \n", st.st_size);
+					printf("Couldn't read file %s\n", name);
 					ret = -1;
 				}
 				else

support/minimig/minimig_config.cpp

@@ -245,7 +245,7 @@ static char* GetConfigurationName(int num)
 	if (d)
 	{
 		if(num) sprintf(path, "minimig%d", num);
-		else sprintf(path, "minimig.cfg", num);
+		else sprintf(path, "minimig.cfg");
 
 		while ((dir = readdir(d)) != NULL)
 		{

user_io.cpp

@@ -2564,7 +2564,7 @@ unsigned char user_io_ext_idx(char *name, char* ext)
 		}
 	}
 
-	printf("not found! use 0\n", name, ext, 0);
+	printf("not found! use 0\n");
 	return 0;
 }