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/p3mx.h b/include/configs/p3mx.h
index 0749037..17ec08f 100644
--- a/include/configs/p3mx.h
+++ b/include/configs/p3mx.h
@@ -44,14 +44,12 @@
 #define CONFIG_750FX			/* 750GL/GX/FX			*/
 #define CONFIG_HIGH_BATS		/* High BATs supported		*/
 #define CONFIG_SYS_BOARD_NAME		"P3M750"
-#define CONFIG_SYS_BUS_HZ		100000000
-#define CONFIG_SYS_BUS_CLK		CONFIG_SYS_BUS_HZ
+#define CONFIG_SYS_BUS_CLK		100000000
 #define CONFIG_SYS_TCLK		100000000
 #elif defined (CONFIG_P3M7448)
 #define CONFIG_74xx
 #define CONFIG_SYS_BOARD_NAME		"P3M7448"
-#define CONFIG_SYS_BUS_HZ		133333333
-#define CONFIG_SYS_BUS_CLK		CONFIG_SYS_BUS_HZ
+#define CONFIG_SYS_BUS_CLK		133333333
 #define CONFIG_SYS_TCLK		133333333
 #endif
 #define CONFIG_SYS_GT_DUAL_CPU			/* also for JTAG even with one cpu */