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/kup/kup4k/u-boot.lds b/board/kup/kup4k/u-boot.lds
index 8e4faa1..e1233a7 100644
--- a/board/kup/kup4k/u-boot.lds
+++ b/board/kup/kup4k/u-boot.lds
@@ -60,9 +60,9 @@
     cpu/mpc8xx/start.o	(.text)
     common/dlmalloc.o	(.text)
     arch/ppc/lib/ppcstring.o	(.text)
-    lib_generic/vsprintf.o	(.text)
-    lib_generic/crc32.o		(.text)
-    lib_generic/zlib.o		(.text)
+    lib/vsprintf.o	(.text)
+    lib/crc32.o		(.text)
+    lib/zlib.o		(.text)
 
     . = env_offset;
     common/env_embedded.o(.text)