Bluetooth: SDP: judge the buf->len before sys_get_be16
Bluetooth: SDP: judge the buf->len before sys_get_be16

There may be less than 2 bytes in buf before calling sys_get_be16.

Signed-off-by: Mark Wang <a817c1960e9712ea975c2384563b7286666c0618@nxp.com>

zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr