bcmkernel: bcm_git: Revert new SDK support, only support WiFi in source code form

By only supporting one WiFi tarball (the sources), there is no ambiguity on the 6.5 branch, because in older SDKs there was a binary and a source tarball but we changed to only import the source-tarball. On 7.x (devel) we support newer SDK where there are now two source tarballs that are both needed. There we still need to change to implementation to take the tarballs in the right order, but on 6.5 we are fine because, with these changes, there is only one tarball to begin with.

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commit 64683d65b5cd8ef9a44b5be0c943915499c8af7a (HEAD) ┃
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Author: Andreas Gnau <andreas.gnau@iopsys.eu>
Date:   Mon Jul 11 20:18:47 2022 +0200

    bcmkernel: bcm_git: Only support WiFi as source code
    
    Only support WiFi drivers provided in source code form. In recent WiFi
    releases we only imported the sources, which is enough, because
    everything is compiled from source, anyways. To reduce any confusion,
    only allow importing the wlan-all-src tarballs, which reduces also an
    usability issue, where the tarballs needed to supplied in the right
    order which no longer exists, now that there is only one tarball to
    import to begin with.
    
    Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>

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commit 66af4422eb1917c838096359a33b7be53eccdd63 ┃
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Author: Andreas Gnau <andreas.gnau@iopsys.eu>
Date:   Mon Jul 11 19:28:02 2022 +0200

    Revert "bcmkernel: Update bcmkernel integration script"
    
    This reverts commit b3a768c075e5af418b0e024f48ad53f06f8186e9.
    On the release-6.5 branch, we do not need to support newer SDKs like
    5.04L.03 and later. Revert the support added for those SDKs.
    
    Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>

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commit 635bb44722b2c1d8da162b5c18614219257a167e ┃
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Author: Andreas Gnau <andreas.gnau@iopsys.eu>
Date:   Mon Jul 11 19:28:00 2022 +0200

    Revert "bcmkernel: Minor update to bcmkernel integration script to support older rsync version"
    
    This reverts commit 22048a57dcee251d2d3c4db102498245c6e89b25.
    
    Signed-off-by: Andreas Gnau <andreas.gnau@iopsys.eu>