example-pmp application doesn't work on qemu w/ FreedomStudio

[pcotret]

• Create a project in Freedom Studio
• Target : qemu-sifive-u54
• Select example program: example-pmp

This program is a demonstration of the Physical Memory Protection unit available in RISC-V

1. Write to an unprotected address
2. Configure the PMP for read-only
3. Re-write to the same address
   => No error...
   Don't know if the QEMU given by SiFive really support the PMP

[pcotret]

Issue isn't related to the code but more about the maturity of PMP support in QEMU https://baylibre.com/risc-v-pmp-and-zephyr-rtos-a-new-userspace-has-entered/