Added signal refresh rate option
modemmanager: update readme.md
Added description for added proto options.

Added compile option to compile --with-at-command-via-dbus for allowing
AT commands to modem without --debug flag

 Changes to be committed:
	modified:   net/modemmanager/Config.in
	modified:   net/modemmanager/Makefile
	modified:   net/modemmanager/files/modemmanager.init
	modified:   net/modemmanager/files/modemmanager.proto
	modified:   README.md

Signed-off-by: Valtteri Holopainen <valtsu@gmail.com>

MBIM and QMI support (necessary for modern and
high-performance LTE modems) should be default
y otherwise the only way to use modemmanager
with these protocols is to recompile the package.
This is very inconvenient for most end users.

Also fix typo in PKG_HASH definition.

Signed-off-by: Alberto Bursi <alberto.bursi@outlook.it>

Signed-off-by: Nicholas Smith <nicholas.smith@telcoantennas.com.au>