rename environment.c in env_embedded.c to reflect is functionality

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/mousse/u-boot.lds.ram b/board/mousse/u-boot.lds.ram
index 46b98a0..d048e52 100644
--- a/board/mousse/u-boot.lds.ram
+++ b/board/mousse/u-boot.lds.ram
@@ -96,7 +96,7 @@
 
   .ppcenv	:
   {
-    common/environment.o (.ppcenv)
+    common/env_embedded.o (.ppcenv)
   } > ram
 
   _end = . ;