"street1":"",
"street2":"",
"street3":"",
"city":"",
"state":"",
"country":""

<aura:attribute name="address" type="map" default="{street1:"",street2:"",street3:"",city:"",state:"",country:""}" />

<lightning:inputAddress
            addressLabel="Address"
            streetLabel="Street"
            cityLabel="City"
            countryLabel="Country"
            provinceLabel="Province"
            postalCodeLabel="PostalCode"
            street="{! v.address.street1 +'n'+v.address.street2+'n'+v.address.street3}"
            city="San Francisco"
            country="US"
            province="CA"
            postalCode="94105"
        />