Enabled general Intel bluetooth driver support instead of specific one.

ibt-11-5 is the specific firmware for Joule. The image for IA should be able
to include multiple firmware, including this one.

For having the firmware in the image, please include linux-firmware-ibt by
IMAGE_INSTALL_append = ' linux-firmware-ibt'

Change-Id: I4451dbbf54145df784b763dd3ef924d8a7ac8863
Signed-off-by: Kien Dinh <kien.t.dinh@intel.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/12421
Reviewed-by: Thomas Rini <trini@konsulko.com>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>