83xx: Replace CONFIG_MPC83XX with CONFIG_MPC83xx

Use the standard lowercase "xx" capitalization that other Freescale
architectures use for CPU defines to prevent confusion and errors

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/api/api_platform-ppc.c b/api/api_platform-ppc.c
index bfcc417..a3d981f 100644
--- a/api/api_platform-ppc.c
+++ b/api/api_platform-ppc.c
@@ -53,7 +53,7 @@
 #define bi_bar	bi_immr_base
 #elif defined(CONFIG_MPC5xxx)
 #define bi_bar	bi_mbar_base
-#elif defined(CONFIG_MPC83XX)
+#elif defined(CONFIG_MPC83xx)
 #define bi_bar	bi_immrbar
 #elif defined(CONFIG_MPC8220)
 #define bi_bar	bi_mbar_base