mmc: vub300: remove unreachable code

The function sched_partition_show cannot execute return, delete the
invalid code.

Signed-off-by: Bo Liu <liubo03@inspur.com>
Link: https://lore.kernel.org/r/20230412084758.2673-1-liubo03@inspur.com


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