Add struct uartlite_data, to store the private data of the Uartlite
driver.
Signed-off-by: NTanvi Desai <tanvi.desai@xilinx.com>
Signed-off-by: NShubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>