misc: rtsx: Remove unneeded variable in rts5260_card_power_on

rts5260_card_power_on do not need local variable to store different value,
Hence just remove it.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Link: https://lore.kernel.org/r/1568307841-44065-1-git-send-email-zhongjiang@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>