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/actux2/u-boot.lds b/board/actux2/u-boot.lds
index 90cafce..d1f7a0a 100644
--- a/board/actux2/u-boot.lds
+++ b/board/actux2/u-boot.lds
@@ -38,7 +38,7 @@
 		cpu/ixp/cpu.o(.text)
 
 		. = env_offset;
-		common/environment.o (.ppcenv)
+		common/env_embedded.o (.ppcenv)
 
 		* (.text)
 	}