[POWERPC] mpc5200: make dts files conform to generic names recommended practice

Modify mpc5200 dts files to match Open Firmware's Generic Names recommended
practice.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/powerpc/boot/serial.c b/arch/powerpc/boot/serial.c
index b6c68ef..9960421 100644
--- a/arch/powerpc/boot/serial.c
+++ b/arch/powerpc/boot/serial.c
@@ -126,7 +126,7 @@
 	         dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
 	         dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
 		rc = cpm_console_init(devp, &serial_cd);
-	else if (dt_is_compatible(devp, "mpc5200-psc-uart"))
+	else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart"))
 		rc = mpc5200_psc_console_init(devp, &serial_cd);
 	else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") ||
 		 dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a"))