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/sbc8641d/u-boot.lds b/board/sbc8641d/u-boot.lds
index 648efa2..7f04124 100644
--- a/board/sbc8641d/u-boot.lds
+++ b/board/sbc8641d/u-boot.lds
@@ -57,9 +57,9 @@
     cpu/mpc86xx/cpu.o (.text)
     cpu/mpc86xx/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)
     *(.text)
     *(.got1)
    }