powerpc/corenet_ds: Move CONFIG_SYS_TEXT_BASE into corenet_ds.h

CONFIG_SYS_TEXT_BASE setting is common across the 'corenet_ds' board
family so move it out of P4080DS.h and into corenet_ds.h

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/corenet_ds.h b/include/configs/corenet_ds.h
index 5b36a56..c5dcdca 100644
--- a/include/configs/corenet_ds.h
+++ b/include/configs/corenet_ds.h
@@ -37,6 +37,10 @@
 #define CONFIG_FSL_CORENET		/* Freescale CoreNet platform */
 #define CONFIG_MP			/* support multiple processors */
 
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xeff80000
+#endif
+
 #define CONFIG_SYS_FSL_CPC		/* Corenet Platform Cache */
 #define CONFIG_SYS_NUM_CPC		CONFIG_NUM_DDR_CONTROLLERS
 #define CONFIG_FSL_ELBC			/* Has Enhanced localbus controller */