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/ppmc7xx/u-boot.lds b/board/ppmc7xx/u-boot.lds
index 5239b35..bfa4975 100644
--- a/board/ppmc7xx/u-boot.lds
+++ b/board/ppmc7xx/u-boot.lds
@@ -60,7 +60,7 @@
 
 /* store the environment in a seperate sector in the boot flash */
 /*    . = env_offset; */
-/*    common/environment.o(.text) */
+/*    common/env_embedded.o(.text) */
 
     *(.text)
     *(.fixup)