Update to 5.19-rc7
    
    - drop obsolete patches
      - patches.suse/tty-extract-tty_flip_buffer_commit-from-tty_flip_buf.patch
      - patches.suse/tty-use-new-tty_insert_flip_string_and_push_buffer-i.patch
    - update configs (x86 only)
      - SPECULATION_MITIGATIONS=y
      - RETHUNK=y
      - CPU_UNRET_ENTRY=y
      - CPU_IBPB_ENTRY=y
      - CPU_IBRS_ENTRY=y