spi: Kconfig: Unmark DEPRECATED for MXS_SPI

MXS_SPI driver now partially converted into driver-model,
so unmark the DEPRECATED option for the same.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
[jagan: update the commit message]
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
1 file changed