I am posting here to confirm this BIOS mod worked on MSI Z87-GD65 Gaming.
I was able to boot NVMe SSD via PCIe adapter after this install.
I am hosting a mirror here to backup the original link.
mod_e7845ims_1c0_add_nvmexpressdxe_5_uc_v28.7z
You must rename the .bin file to E7845IMS.1C0