mpc512x: use common code for clock setting for all mpc512x boards

Only define enabled clocks in the config file and enable
the clocks in common code.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Reinhard Arlt <reinhard.arlt@esd-electronics.com>
Cc: Wolfgang Denk <wd@denx.de>
diff --git a/arch/powerpc/cpu/mpc512x/cpu_init.c b/arch/powerpc/cpu/mpc512x/cpu_init.c
index ac2605a..2f6a14f 100644
--- a/arch/powerpc/cpu/mpc512x/cpu_init.c
+++ b/arch/powerpc/cpu/mpc512x/cpu_init.c
@@ -180,6 +180,15 @@
 	 * during FLASH chip identification etc.
 	 */
 	setbits_be32(&im->sysconf.spcr, SPCR_TBEN);
+
+	/*
+	 * Enable clocks
+	 */
+	out_be32(&im->clk.sccr[0], SCCR1_CLOCKS_EN);
+	out_be32(&im->clk.sccr[1], SCCR2_CLOCKS_EN);
+#if defined(CONFIG_IIM) || defined(CONFIG_CMD_FUSE)
+	setbits_be32(&im->clk.sccr[1], CLOCK_SCCR2_IIM_EN);
+#endif
 }
 
 int cpu_init_r (void)