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/board/socrates/socrates.c b/board/socrates/socrates.c
index 97fd0e4..2caefbb 100644
--- a/board/socrates/socrates.c
+++ b/board/socrates/socrates.c
@@ -143,7 +143,7 @@
 
 	get_sys_info (&sysinfo);
 	clkdiv = lbc->lcrr & LCRR_CLKDIV;
-	lbc_mhz = sysinfo.freqSystemBus / 1000000 / clkdiv;
+	lbc_mhz = sysinfo.freq_systembus / 1000000 / clkdiv;
 
 	/* Disable PLL bypass for Local Bus Clock >= 66 MHz */
 	if (lbc_mhz >= 66)