Get rid of bogus CONFIG_SYS_BUS_HZ and CONFIG_SYS_CONFIG_BUS_CLK definitions

CONFIG_SYS_BUS_HZ has not really been used anywhere except to be
redined as CONFIG_SYS_BUS_CLK; in addition, the mpc7448hpc2 had the
bogus CONFIG_SYS_CONFIG_BUS_CLK setting which duplicated the
funtionality.  Change all this to use CONFIG_SYS_BUS_CLK consistently.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Frank Gottschling <fgottschling@eltec.de>
Cc: Reinhard Arlt <reinhard.arlt@esd-electronics.com>
Cc: Eran Man <eran@nbase.co.il>
Cc: Stefan Roese <sr@denx.de>
Cc: Nye Liu <nyet@zumanetworks.com>
Cc: Roy Zang <tie-fei.zang@freescale.com>
diff --git a/include/configs/ZUMA.h b/include/configs/ZUMA.h
index b73aaa8..fcc47a9 100644
--- a/include/configs/ZUMA.h
+++ b/include/configs/ZUMA.h
@@ -164,9 +164,7 @@
 
 #define CONFIG_SYS_HZ			1000		/* decr freq: 1ms ticks */
 
-#define CONFIG_SYS_BUS_HZ		133000000	/* 133 MHz		*/
-
-#define CONFIG_SYS_BUS_CLK		CONFIG_SYS_BUS_HZ
+#define CONFIG_SYS_BUS_CLK		133000000	/* 133 MHz		*/
 
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200, 230400 }