5 - "ti,omap2-spi" for OMAP2 & OMAP3.
6 - "ti,omap4-spi" for OMAP4+.
7 - ti,spi-num-cs : Number of chipselect supported by the instance.
8 - ti,hwmods: Name of the hwmod associated to the McSPI
9 - ti,pindir-d0-out-d1-in: Select the D0 pin as output and D1 as
10 input. The default is D0 as input and
18 compatible = "ti,omap4-mcspi";