Add non DM version of SPI_MEM to support easy migration to new SPI NOR
framework. This can be removed once DM_SPI conversion is complete.
Signed-off-by: Vignesh R <vigneshr@ti.com> Tested-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Tested-by: Stefan Roese <sr@denx.de> Tested-by: Horatiu Vultur <horatiu.vultur@microchip.com> Reviewed-by: Jagan Teki <jagan@openedev.com> Tested-by: Jagan Teki <jagan@amarulasolutions.com> #zynq-microzed