net/ipxe: Update to latest commit
- Build more EFI images [1]
Changes: https://github.com/ipxe/ipxe/compare/bdf0e029ae8c9a0e173d5988ee64ff910538af53...9ee70fb95bc266885ff88be228b044a2bb226eeb
Submitted by: skozlov (based on) [1]
Differential Revision: https://reviews.freebsd.org/D25213