dt/spi: Eliminate users of of_platform_{,un}register_driver

Get rid of users of of_platform_driver in drivers/spi.  The
of_platform_{,un}register_driver functions are going away, so the
users need to be converted to using the platform_bus_type directly.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/spi/spi_fsl_lib.h b/drivers/spi/spi_fsl_lib.h
index 281e060..cbe881b 100644
--- a/drivers/spi/spi_fsl_lib.h
+++ b/drivers/spi/spi_fsl_lib.h
@@ -118,7 +118,6 @@
 extern int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
 		unsigned int irq);
 extern int mpc8xxx_spi_remove(struct device *dev);
-extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev,
-				const struct of_device_id *ofid);
+extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev);
 
 #endif /* __SPI_FSL_LIB_H__ */