RTL8720DN is part of the Ameba D family, so for details of Ameba D, you may refer to this page
Alternatively, you may check the github repo for Ameba D at here
As far as I know, there is no existing SVD file for Ameba D, as its primarily developed using GCC and IAR, SVD file is not required for these platforms
I am developing with GCC and debugging with Ozone, i would like to have an .svd file to see my registers. Does anybody have this or should i make one myself?