tools: patman cannot find aiohttp module

[Tony Dinh]

Hi Tom,

I've just done a git pull on the master branch. And then ran patman
and got this error.

./tools/patman/patman  -c1 -s2 send -n
Traceback (most recent call last):
  File "/usr/src/u-boot-marvell/./tools/patman/patman", line 21, in <module>
    from patman import control
  File "/usr/src/u-boot-marvell/tools/patman/../patman/control.py",
line 24, in <module>
    from patman import cseries
  File "/usr/src/u-boot-marvell/tools/patman/../patman/cseries.py",
line 19, in <module>
    from patman import cser_helper
  File "/usr/src/u-boot-marvell/tools/patman/../patman/cser_helper.py",
line 18, in <module>
    import aiohttp
ModuleNotFoundError: No module named 'aiohttp'

I'm on Debian 12.11 and have Python 3.11.2. Is there something I might
be missing?

Thanks,
Tony