* Update to 6.7:
  - d/copyright: Remove drivers/net/appletalk/cops*; removed upstream
    Upstream commit: 00f3696f7555d0890ae07b635e6ccbf39fd2eb3a
  - d/rules.d/scripts/mod: Add symsearch to Makefile.real
    Upstream commit 4074532758c5c367d3fcb8d124150824a254659d added a
    symsearch object to modpost, so add it to our `Makefile.real` too.
* Drop patches applied upstream:
  - Drop "powerpc: Don't clobber f0/vs0 during fp|altivec register save"
* Drop patches:
  - Drop "Add removal patches for: 3c359, smctr, keyspan, cops"; cops
    support removed upstream which was the last remaining part
    Upstream commit: 00f3696f7555d0890ae07b635e6ccbf39fd2eb3a
  - Drop "Hardcode arch script output"; ia64 architecture removed upstream
    Upstream commit: cf8e8658100d4eae80ce9b21f7a81cb024dd5057
* Refresh patches:
  - Adjust context in "Tweak gitignore for Debian pkg-kernel using git"
    Upstream commit: ffa46bbc5892ebba8a95c839dc302cad7f22c209
  - Adjust context in "video: Remove nvidiafb an...