r600/llvm: Free binary.code/binary.config in r600_llvm_compile

radeon_llvm_compile allocates memory for binary.code, binary.config,
or neither depending on what's being done.

We need to make sure to free that memory after it's no longer needed.

v2: Don't bother checking for null before FREE()

CC: "10.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 01f3622c74)

src/gallium/drivers/r600/r600_llvm.c

@@ -745,6 +745,9 @@ unsigned r600_llvm_compile(
 		}
 	}
 
+	FREE(binary.code);
+	FREE(binary.config);
+
 	return r;
 }