Are the virtual page sizes only allowed to be 1024 and 2048 for the nRF52840?
// This is a multiple of the physical page size. Is this allowed or not?
// <i> Expressed in number of 4-byte words.
// <i> By default, a virtual page is the same size as a physical page.
// <i> The size of a virtual page must be a multiple of the size of a physical page.
// <1024=> 1024
// <2048=> 2048
#define FDS_VIRTUAL_PAGE_SIZE (1024*3)
