Revert "net/bluetooth/hci_conn.c: Fix compile with GCC 4.8"

This reverts commit f9ac21e5bcbcaed2159db8a81fd095f9924c4d2a.

	modified:   net/bluetooth/hci_conn.c
Revert " ARM: compressed/head.S: work around new binutils warning"

This reverts commit e95971c410ad05f402c759bada5bac76a51af723.

	modified:   arch/arm/boot/compressed/Makefile
	modified:   arch/arm/boot/compressed/head.S