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/ms7750se/u-boot.lds b/board/ms7750se/u-boot.lds
index 88b4f5c..7dffe00 100644
--- a/board/ms7750se/u-boot.lds
+++ b/board/ms7750se/u-boot.lds
@@ -49,9 +49,9 @@
 	{
 		cpu/sh4/start.o		(.text)
 		. = ALIGN(8192);
-		common/environment.o	(.ppcenv)
+		common/env_embedded.o	(.ppcenv)
 		. = ALIGN(8192);
-		common/environment.o	(.ppcenvr)
+		common/env_embedded.o	(.ppcenvr)
 		. = ALIGN(8192);
 		*(.text)
 		. = ALIGN(4);