arm64: defconfig: enable bluetooth supports as modules

Enable the following items for bluetooth mouse and speaker which base
on HCIUART.

a) CONFIG_BT_HCIUART
b) CONFIG_BT_HCIUART_LL
c) CONFIG_BT_HIDP

Enable bluetooth LED support.

d) CONFIG_BT_LEDS

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>