tools/Makefile: Remove pci target

JIRA: https://issues.redhat.com/browse/RHEL-83611
Upstream Status: 86c2345aff3f5b48b53a73a15ffe6e0930e4170f

commit 86c2345aff3f5b48b53a73a15ffe6e0930e4170f
Author: Jianfeng Liu <liujianfeng1994@gmail.com>
Date:   Mon Feb 17 19:51:52 2025 +0800

    tools/Makefile: Remove pci target

    e19bde2269ca ("selftests: Move PCI Endpoint tests from tools/pci to
    Kselftests") moves tools/pci/ to tools/testing/selftests/pci_endpoint,
    which causes build failure when running "make pci" under tools:

      linux/tools$ make pci
        DESCEND pci
      make[1]: *** No targets specified and no makefile found.  Stop.
      make: *** [Makefile:73: pci] Error 2

    Update the top level tools/Makefile to remove reference to building,
    installing and cleaning pci components.

    Link: https://lore.kernel.org/r/20250217115159.537920-1-liujianfeng1994@gmail.com


    Fixes: e19bde2269ca ("selftests: Move PCI Endpoint tests from tools/pci to Kselftests")
Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

Signed-off-by: Myron Stowe <mstowe@redhat.com>