How to use with QEMU

I tried to boot EDK2 using the following command with the latest qemu:
```
#!/bin/sh
set -e

qemu-system-aarch64 -bios ~/Downloads/RPI_EFI.fd \
  -M raspi4b \
  -cpu cortex-a72 \
  -smp 4 \
  -m 2G \
  -display gtk
```

However the framebuffer doesn't display anything, even with -nographic instead of a display...