mpc85xx: use IS_E_PROCESSOR macro

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index 0d50549..bde8e56 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -97,7 +97,7 @@
 	if (cpu) {
 		puts(cpu->name);
 
-		if (svr & 0x80000)
+		if (IS_E_PROCESSOR(svr))
 			puts("E");
 	} else {
 		puts("Unknown");