Bluetooth: btmrvl: add SD8787 Bluetooth AMP device ID

SD8787 SDIO function 3 (device ID 0x911B) is for Bluetooth AMP.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>