staging: rts5208: fix memleaks on error handling paths in probe

rtsx_probe() allocates host, but does not free it on error handling
paths. The patch adds missed scsi_host_put().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Link: https://lore.kernel.org/r/20200623141230.7258-1-novikov@ispras.ru


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