Merge tag 'xtensa-20250603' of https://github.com/jcmvbkbc/linux-xtensa

Pull xtensa updates from Max Filippov:

 - migrate to the generic rule for built-in DTB

 - cleanups in code and common_defconfig

* tag 'xtensa-20250603' of https://github.com/jcmvbkbc/linux-xtensa:
  arch: xtensa: defconfig: Drop obsolete CONFIG_NET_CLS_TCINDEX
  xtensa: migrate to the generic rule for built-in DTB
  xtensa: ptrace: Remove zero-length alignment array