I am a hotel and resort photographer professionally, but also take a lot of travel photography just for pleasure.
As a far as I am concerned anything which captures the essence of a place can be termed travel photography, regardless of what camera it is taken on.
The photograph below was taken on Nikon's first pro digital camera - the Nikon D1. A real dog but I still managed to get a great shot (I hope you agree)
http://www.hotelresortphotography.co.uk/hotelresortphotography.co.uk/wp-content/uploads/2017/01/Resort-Photographers-001a.jpg