Revert "net/bluetooth/hci_conn.c: GCC 4.8.x fix up again"

This reverts commit 6f8629a467a5107e805422d9dad43fcc4c05fd42.
Revert "Linaro 4.8 fixes"

This reverts commit e970a63d2408bcce75ebfbe0dc4e84c2560070e0.
Revert "net/bluetooth/hci_conn.c: GCC 4.8.x fix up again"

This reverts commit e4d4f826eb85e9dc66be1c165a7e483e153b158a.