mmc: block: Drop use of unlikely() in mmc_blk_probe()

mmc_blk_probe() isn't a hotpath, which makes it's questionable to use
unlikely(). Therefore let's simply drop it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210303122049.151986-2-ulf.hansson@linaro.org


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