powerpc: Fix CamelCase checkpatch warnings

85xx, 86xx PowerPC folders have code variables with CamelCase naming conventions.
because of this code checkpatch script generates "WARNING: Avoid CamelCase".

Convert variables name to normal naming convention and modify board, driver
files with updated the new structure.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>
diff --git a/include/mpc86xx.h b/include/mpc86xx.h
index 31e83f2..9fe4748 100644
--- a/include/mpc86xx.h
+++ b/include/mpc86xx.h
@@ -41,9 +41,9 @@
 #ifndef __ASSEMBLY__
 
 typedef struct {
-	unsigned long freqProcessor;
-	unsigned long freqSystemBus;
-	unsigned long freqLocalBus;
+	unsigned long freq_processor;
+	unsigned long freq_systembus;
+	unsigned long freq_localbus;
 } MPC86xx_SYS_INFO;
 
 #define l1icache_enable	icache_enable