patman: Move library functions into a library directory

The patman directory has a number of modules which are used by other tools
in U-Boot. This makes it hard to package the tools using pypi since the
common files must be copied along with the tool that uses them.

To address this, move these files into a new u_boot_pylib library. This
can be packaged separately and listed as a dependency of each tool.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index 7b9be88..d81752e 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -19,10 +19,10 @@
 
 from buildman import builderthread
 from buildman import toolchain
-from patman import command
 from patman import gitutil
-from patman import terminal
-from patman.terminal import tprint
+from u_boot_pylib import command
+from u_boot_pylib import terminal
+from u_boot_pylib.terminal import tprint
 
 # This indicates an new int or hex Kconfig property with no default
 # It hangs the build since the 'conf' tool cannot proceed without valid input.
diff --git a/tools/buildman/builderthread.py b/tools/buildman/builderthread.py
index 8b88c68..879ff138 100644
--- a/tools/buildman/builderthread.py
+++ b/tools/buildman/builderthread.py
@@ -10,8 +10,8 @@
 import threading
 
 from buildman import cfgutil
-from patman import command
 from patman import gitutil
+from u_boot_pylib import command
 
 RETURN_CODE_RETRY = -1
 BASE_ELF_FILENAMES = ['u-boot', 'spl/u-boot-spl', 'tpl/u-boot-tpl']
diff --git a/tools/buildman/cfgutil.py b/tools/buildman/cfgutil.py
index ab74a8e..a340e01 100644
--- a/tools/buildman/cfgutil.py
+++ b/tools/buildman/cfgutil.py
@@ -7,7 +7,7 @@
 
 import re
 
-from patman import tools
+from u_boot_pylib import tools
 
 RE_LINE = re.compile(r'(# )?CONFIG_([A-Z0-9_]+)(=(.*)| is not set)')
 RE_CFG = re.compile(r'(~?)(CONFIG_)?([A-Z0-9_]+)(=.*)?')
diff --git a/tools/buildman/control.py b/tools/buildman/control.py
index c3c5388..f765fe3 100644
--- a/tools/buildman/control.py
+++ b/tools/buildman/control.py
@@ -13,12 +13,12 @@
 from buildman import cfgutil
 from buildman import toolchain
 from buildman.builder import Builder
-from patman import command
 from patman import gitutil
 from patman import patchstream
-from patman import terminal
-from patman import tools
-from patman.terminal import tprint
+from u_boot_pylib import command
+from u_boot_pylib import terminal
+from u_boot_pylib import tools
+from u_boot_pylib.terminal import tprint
 
 def GetPlural(count):
     """Returns a plural 's' if count is not 1"""
diff --git a/tools/buildman/func_test.py b/tools/buildman/func_test.py
index cf91c33..ebd78f2 100644
--- a/tools/buildman/func_test.py
+++ b/tools/buildman/func_test.py
@@ -14,11 +14,11 @@
 from buildman import cmdline
 from buildman import control
 from buildman import toolchain
-from patman import command
 from patman import gitutil
-from patman import terminal
-from patman import test_util
-from patman import tools
+from u_boot_pylib import command
+from u_boot_pylib import terminal
+from u_boot_pylib import test_util
+from u_boot_pylib import tools
 
 settings_data = '''
 # Buildman settings file
diff --git a/tools/buildman/main.py b/tools/buildman/main.py
index 67c560c..6076ba5 100755
--- a/tools/buildman/main.py
+++ b/tools/buildman/main.py
@@ -25,8 +25,8 @@
 from buildman import toolchain
 from patman import patchstream
 from patman import gitutil
-from patman import terminal
-from patman import test_util
+from u_boot_pylib import terminal
+from u_boot_pylib import test_util
 
 def RunTests(skip_net_tests, verboose, args):
     from buildman import func_test
diff --git a/tools/buildman/test.py b/tools/buildman/test.py
index daf5467..9fa6445 100644
--- a/tools/buildman/test.py
+++ b/tools/buildman/test.py
@@ -17,10 +17,10 @@
 from buildman import control
 from buildman import toolchain
 from patman import commit
-from patman import command
-from patman import terminal
-from patman import test_util
-from patman import tools
+from u_boot_pylib import command
+from u_boot_pylib import terminal
+from u_boot_pylib import test_util
+from u_boot_pylib import tools
 
 use_network = True
 
diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
index ea1ad1b..688f2e2 100644
--- a/tools/buildman/toolchain.py
+++ b/tools/buildman/toolchain.py
@@ -11,9 +11,9 @@
 import urllib.request, urllib.error, urllib.parse
 
 from buildman import bsettings
-from patman import command
-from patman import terminal
-from patman import tools
+from u_boot_pylib import command
+from u_boot_pylib import terminal
+from u_boot_pylib import tools
 
 (PRIORITY_FULL_PREFIX, PRIORITY_PREFIX_GCC, PRIORITY_PREFIX_GCC_PATH,
     PRIORITY_CALC) = list(range(4))