Rename lib_generic/ to lib/

Now that the other architecture-specific lib directories have been
moved out of the top-level directory there's not much reason to have the
'_generic' suffix on the common lib directory.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/ml2/u-boot.lds b/board/ml2/u-boot.lds
index 0083a21..e68cfb8 100644
--- a/board/ml2/u-boot.lds
+++ b/board/ml2/u-boot.lds
@@ -64,9 +64,9 @@
     cpu/ppc4xx/cpu_init.o	(.text)
     cpu/ppc4xx/speed.o	(.text)
     common/dlmalloc.o	(.text)
-    lib_generic/crc32.o		(.text)
+    lib/crc32.o		(.text)
     arch/ppc/lib/extable.o	(.text)
-    lib_generic/zlib.o		(.text)
+    lib/zlib.o		(.text)
 
 /*    . = env_offset;*/
 /*    common/env_embedded.o(.text)*/