While the current kernel drivers/of/ code allows developers to be
sloppy and use a DTS status value of "ok", the current DTSpec 0.1
makes it clear that the proper spelling is "okay", so fix the small
number of PowerPC .dts files that do this.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>