are photographs intended to be used as artwork ( on the wall, on a calendar &C ) expicitly made for that purpose considered to be commercial "art" - if they are done on commission ( like a portrait or something else ) ....
Easy: just ask Michaelangelo if his commissioned work for the Sistine chapel is art or not.
There's a trend in criticism to separate commissioned from non-commissioned work but I think that's a remainder of Romanticism's expressiveness theory: if a work is not the fullest expression of what an artist feels, it's not worth as much.
Although art is an evaluative concept (i.e. one that is applicable only to things having a certain value), I think it's best to consider it in terms of currency rather than consecration.
An artwork has artistic value, and there are many possible definitions of this value, or sub-components. But it's not because something is highly valuable that makes it art: a penny is worth way less than a 100$ bill, but both are money, both have the property of working within a system of valuation, both have currency.
Same thing for art: if it's explained better in terms of artistic value, then you're set, and you can even have bad art if you wish (a penny-work, to follow the metaphor).
I personnally don't agree with the devaluation of commissioned work. Some people make amazing work under commission, and for quite a long time that was the majority of produced art. It took an autonomous art market to have "expressive" art like in the 19th Century, before that you were more or less chained to a patron, and he decided how much freedom to give you.
The LIFE photojournalists worked under commission: they were assigned a place and a subject, and we know how bad that turned up
I think someone being able to make commissioned work "sing" is admirable and is another proof of true professionalism and true artistic talent.