cros_ec_lpc_mec_acpi_mutex
ret = cros_ec_lpc_mec_acpi_mutex(ACPI_COMPANION(dev), name);
EXPORT_SYMBOL(cros_ec_lpc_mec_acpi_mutex);
int cros_ec_lpc_mec_acpi_mutex(struct acpi_device *adev, const char *pathname);