ppc4xx: Remove weak binding from common Denali data-eye search code

Now that there are no board-specific versions of
"denali_core_search_data_eye()", the weak binding on the common version
can be removed.

Signed-off-by: Larry Johnson <lrj@acm.org>
diff --git a/cpu/ppc4xx/denali_data_eye.c b/cpu/ppc4xx/denali_data_eye.c
index 6c949a0..967e61b 100644
--- a/cpu/ppc4xx/denali_data_eye.c
+++ b/cpu/ppc4xx/denali_data_eye.c
@@ -99,14 +99,7 @@
 /*-----------------------------------------------------------------------------+
  * denali_core_search_data_eye.
  +----------------------------------------------------------------------------*/
-/*
- * Avoid conflict with implementations of denali_core_search_data_eye in board-
- * specific code.
- */
 void denali_core_search_data_eye(void)
-    __attribute__ ((weak, alias("__denali_core_search_data_eye")));
-
-void __denali_core_search_data_eye(void)
 {
 	int k, j;
 	u32 val;