net: wan: fsl_qmc_hdlc: Fix module compilation

The fsl_qmc_driver does not compile as module:
  error: ‘qmc_hdlc_driver’ undeclared here (not in a function);
    405 | MODULE_DEVICE_TABLE(of, qmc_hdlc_driver);
        |                         ^~~~~~~~~~~~~~~

Fix the typo.

Fixes: b40f00ecd463 ("net: wan: Add support for QMC HDLC")
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Closes: https://lore.kernel.org/linux-kernel/87ttl93f7i.fsf@mail.lhotse/


Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>