Merge remote-tracking branch 'stable/linux-4.19.y' into rpi-4.19.y

diff --cc arch/arm64/Makefile
Simple merge

diff --cc drivers/mmc/core/core.c
Simple merge

diff --cc drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
Simple merge

diff --cc drivers/usb/host/xhci.c
Simple merge

diff --cc net/bluetooth/hci_conn.c
Simple merge