soc/intel_adsp: Polish cavstool
soc/intel_adsp: Polish cavstool

There's desire for a "log only" mode like the older adsplog script
had.  Add a few other quality of life command line options too.  And
catch the most obvious user errors to print a message instead of a
stack dump.

Signed-off-by: Andy Ross <c70f9a6bf6ee0cd69c8af4ce5e6b131945769315@intel.com>

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