Merge tag 'kbuild-fixes-v5.11' of git://

Pull Kbuild fixes from Masahiro Yamada:

 - Search for <ncurses.h> in the default header path of HOSTCC

 - Tweak the option order to be kind to old BSD awk

 - Remove 'kvmconfig' and 'xenconfig' shorthands

 - Fix documentation

* tag 'kbuild-fixes-v5.11' of git://
  Documentation: kbuild: Fix section reference
  kconfig: remove 'kvmconfig' and 'xenconfig' shorthands
  lib/raid6: Let $(UNROLL) rules work with macOS userland
  kconfig: Support building mconf with vendor sysroot ncurses
  kconfig: config script: add a little user help
  MAINTAINERS: adjust GCC PLUGINS after removal