mmc: wmt-sdmmc: Fix an error handling path in wmt_mci_probe()

mmc: wmt-sdmmc: Fix an error handling path in wmt_mci_probe()

A dma_free_coherent() call is missing in the error handling path of the
probe, as already done in the remove function.

Fixes: 9acb1cb627a2 ("mmc: SD/MMC Host Controller for Wondermedia WM8505/WM8650")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/53fc6ffa5d1c428fefeae7d313cf4a669c3a1e98.1663873255.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>