[POWERPC] mpc5200: normalize compatible property bindings

Update MPC5200 drivers to also look for compatible properties in the
form "fsl,mpc5200-*" to better conform to open firmware generic names
recommended practice as published here:

http://www.openfirmware.org/1275/practice/gnames/gnamv14a.html

This patch should *not* break compatibility with older device trees
which do not use the 'fsl,' prefix.  The drivers will still bind against
the older names also.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/spi/mpc52xx_psc_spi.c b/drivers/spi/mpc52xx_psc_spi.c
index d398c93..a3ebc63 100644
--- a/drivers/spi/mpc52xx_psc_spi.c
+++ b/drivers/spi/mpc52xx_psc_spi.c
@@ -628,8 +628,9 @@
 }
 
 static struct of_device_id mpc52xx_psc_spi_of_match[] = {
-	{ .type = "spi", .compatible = "mpc5200-psc-spi", },
-	{},
+	{ .compatible = "fsl,mpc5200-psc-spi", },
+	{ .compatible = "mpc5200-psc-spi", }, /* old */
+	{}
 };
 
 MODULE_DEVICE_TABLE(of, mpc52xx_psc_spi_of_match);