patman: Move to absolute imports

At present patman sets the python path on startup so that it can access
the libraries it needs. If we convert to use absolute imports this is not
necessary.

Move patman to use absolute imports. This requires changes in tools which
use the patman libraries (which is most of them).

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/elf.py

@@ -13,9 +13,9 @@ import shutil
 import struct
 import tempfile
 
-import command
-import tools
-import tout
+from patman import command
+from patman import tools
+from patman import tout
 
 ELF_TOOLS = True
 try: