Revert "net: wireless: bcmdhd: Clean scan status if request is empty"

This reverts commit f495b9412ac49511291aaf73b7a50a29b08f04be.
Revert "[SCSI] Remove scsi_wait_scan module"

This reverts commit b28a24db4e8494c6fed00f0f460e81e179e4482d.
Revert "ipv6: introdcue __ipv6_addr_needs_scope_id and ipv6_iface_scope_id helper functions"

This reverts commit 889b0e1c7cdb26130b0b83ee359bb375bc3ec768.