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/uc100/u-boot.lds b/board/uc100/u-boot.lds
index db29342..c69fe47 100644
--- a/board/uc100/u-boot.lds
+++ b/board/uc100/u-boot.lds
@@ -65,7 +65,7 @@
     lib_ppc/cache.o		(.text)
     lib_ppc/time.o		(.text)
 
-    common/environment.o	(.text)
+    common/env_embedded.o	(.text)
 
     *(.text)
     *(.fixup)