mmc: meson-gx: Fix an error handling path in meson_mmc_probe()

The commit in Fixes has introduced a new error handling which should goto
the existing error handling path.
Otherwise some resources leak.

Fixes: 19c6beaa ("mmc: meson-gx: add device reset")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/be4b863bacf323521ba3a02efdc4fca9cdedd1a6.1659855351.git.christophe.jaillet@wanadoo.fr


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>