ppc/km/tegr1: support second localbus clock signal

On kmtegr1 we have to specify the second localbus clock signal also
instead of using the default for our ppc 8309 boards.

Signed-off-by: Holger Brunck <holger.brunck@ch.abb.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
CC: Priyanka Jain <priyanka.jain@nxp.com>
CC: Valentin Longchamp <valentin.longchamp@ch.abb.com>
diff --git a/include/configs/km/km-mpc8309.h b/include/configs/km/km-mpc8309.h
index 9aaea27..e710c04 100644
--- a/include/configs/km/km-mpc8309.h
+++ b/include/configs/km/km-mpc8309.h
@@ -22,6 +22,7 @@
  * System IO Config
  */
 /* 0x14000180 SICR_1 */
+#ifndef CONFIG_SYS_SICRL
 #define CONFIG_SYS_SICRL (0			\
 		| SICR_1_UART1_UART1RTS		\
 		| SICR_1_I2C_CKSTOP		\
@@ -38,6 +39,7 @@
 		| SICR_1_FEC1_FEC1		\
 		| SICR_1_FEC2_FEC2		\
 		)
+#endif
 
 /* 0x00080400 SICR_2 */
 #define CONFIG_SYS_SICRH (0			\