Staging: rts5208: helper function to enable interrupts during reset

Define the helper function rtsx_enable_pcie_intr to shorten the
rtsx_reset_chip code and get rid of the LONG_LINE checkpatch warnings.

Signed-off-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpente@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>