patman is no longer shipped from the U-Boot tree, so drop it from the
'make pip' target and from make_pip.sh, and remove its packaging files
(setup.py, pyproject.toml, requirements.txt). Nothing else refers to
them by this point in the series, so they can go.
Also fix binman's pyproject.toml, which declares package-data for a
'patman' package (a copy-paste leftover); use 'binman' instead.
Signed-off-by: Simon Glass <sjg@chromium.org>