[PATCH v2 3/7] doc: make pdfdocs: Add pip install -r test/py/requirements.txt to the list of needed steps

[Adriano Carvalho]

As requested, I added this step to all doc targets.

If I don't do this, this is what I get with
docker.io/trini/u-boot-gitlab-ci-runner:jammy-20250714-25Jul2025:

uboot at 35c89b9ab70e:~/u-boot$ make pdfdocs
[...]
WARNING: autodoc: failed to import module 'test_bind'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_bootmenu'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_bootstage'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_button'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_efi_loader'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_net'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
WARNING: autodoc: failed to import module 'test_net_boot'; the following exception was raised:
No module named 'pytest' [autodoc.import_object]
[...]
build finished with problems, 7 warnings (with warnings treated as errors).
make[1]: *** [doc/Makefile:84: latexdocs] Error 1
make: *** [Makefile:2687: pdfdocs] Error 2

NOTE: This won't completely fix the pdfdocs target. See next commit(s).

Signed-off-by: Adriano Carvalho <adrianocarvalho.pt at gmail.com>
---
 doc/build/documentation.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/build/documentation.rst b/doc/build/documentation.rst
index f977781184d..483bdc42227 100644
--- a/doc/build/documentation.rst
+++ b/doc/build/documentation.rst
@@ -35,6 +35,7 @@ The *htmldocs* target is used to build the HTML documentation. It uses the
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install -r test/py/requirements.txt
     # Build the documentation
     make htmldocs
     # Deactivate the Python environment
@@ -58,6 +59,7 @@ The *infodocs* target builds both a texinfo and an info file:
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install -r test/py/requirements.txt
     # Build the documentation
     make infodocs
     # Deactivate the Python environment
@@ -78,6 +80,7 @@ The *pdfdocs* target is meant to be used to build PDF documentation:
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install -r test/py/requirements.txt
     # Build the documentation
     make pdfdocs
     # Deactivate the Python environment
@@ -95,6 +98,7 @@ We can use texi2pdf instead:
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install -r test/py/requirements.txt
     # Build the documentation
     make texinfodocs
     # Deactivate the Python environment
@@ -115,6 +119,7 @@ To build only the texinfo documentation the *texinfodocs* target is used:
     . myenv/bin/activate
     # Install build requirements
     python3 -m pip install -r doc/sphinx/requirements.txt
+    python3 -m pip install -r test/py/requirements.txt
     # Build the documentation
     make texinfodocs
     # Deactivate the Python environment
-- 
2.34.1