uqmi: wms - added storage to read text messages

uqmi: wms - added storage to read text messages

Today it's hard coded to read text messages from SIM card.
Not all devices store received text messages in SIM, they store
in me, QMI_WMS_STORAGE_TYPE_NV.
I have added --storage as an argumet available to
--list-messages
--get-message
--delete-message
--get-raw-message

If --storage is omitted default storage is sim, as before.

Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Henrik Ginstmark <henrik@ginstmark.se>