arm64: defconfig: enable CONFIG_USB_CONFIGFS_F_FS by default

arm64: defconfig: enable CONFIG_USB_CONFIGFS_F_FS by default

BugLink: http://bugs.launchpad.net/bugs/1763040
Allows creation of USB composite functions in userspace.
Required for diag USB support.

Signed-off-by: Ramon Fried <rfried@codeaurora.org>
Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
(cherry picked from commit 4255a1c29ebea8f80621603915866723f436ecea
http://git.linaro.org/landing-teams/working/qualcomm/kernel.git release/qcomlt-4.14)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>