opencl: Silence warning about duplicate const qualifier

ocl.c

@@ -339,7 +339,7 @@ int clDevicesNum(void) {
 	return most_devices;
 }
 
-cl_int bfg_clBuildProgram(_clState * const clState, const cl_device_id const devid, const char * const CompilerOptions)
+cl_int bfg_clBuildProgram(_clState * const clState, const cl_device_id devid, const char * const CompilerOptions)
 {
 	cl_int status;