modem: hl7800: Configure name for work queue
modem: hl7800: Configure name for work queue

Prevent blank entry in kernel stacks shell command output.

Signed-off-by: Andrew Hedin <cfaa21060861c7d5fb254996490bbefe1427664c@lairdconnect.com>

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