Inversion every 2D slice for arbitrary Multi-dimension array.

Inverse every 2D matrix slice (the first two dimensions) for multi-dimensional array M:
M(:,:,p,q,...) * X(:,:,p,q,...) = repmat(eye(m),[1,1,p,q,...]),
where input M is a N-D array (m x m x [p x q x ...]), for all possible m=1,2,3,...
and optional higher dimensions. Output X array has the same size as M.