make run-simple-system failure

Nobody has claimed this yet.

## Observed Behavior
make run-simple-system fails to compile simple program

ibex/examples/sw/simple_system/common/simple_system_common.c:40: Error: unrecognized opcode `csrw minstret,x0', extension `zicsr' required

## Expected Behavior

make run-simple-system compiles simple program

## Steps to reproduce the issue
### Setup virtual environment

1. python -m venv ~/.ibex-eda/
2. . ~/.ibex-eda/bin/activate
3. pip install mako
4. pip install packaging

### build system

1. . ~/.ibex-eda/bin/activate
2. git clone https://github.com/olofk/edalize.git
3. cd edalize
4. pip install .
5. cd ..
6. git clone https://github.com/lowRISC/fusesoc.git
7. cd fusesoc
8. pip install .
9. cd ..
11. git clone https://github.com/lowRISC/ibex.git
12. ./util/ibex_config.py small fusesoc_opts

`--RV32E=0 --RV32M=ibex_pkg::RV32MFast --RV32B=ibex_pkg::RV32BNone --RegFile=ibex_pkg::RegFileFF --BranchTargetALU=0 --WritebackStage=0 --ICache=0 --ICacheECC=0 --ICacheScramble=0 --BranchPredictor=0 --DbgTriggerEn=0 --SecureIbex=0 --PMPEnable=0 --PMPGranularity=0 --PMPNumRegions=4 --MHPMCounterNum=0 --MHPMCounterWidth=40`

13. ./util/check_tool_requirements.py
`INFO: Tool verilator present: Sufficiently recent version (found 5.028; needed 4.210)
INFO: Tool edalize present: Sufficiently recent version (found 0.6.2.dev2+g1eedb7f; needed 0.2.0)`

14. make build-simple-system
15. make run-simple-system

As a quick aside having the above steps would be helpful in the documentation.

No modifications to any sources.
No parameters set.

## My Environment
Nothing special
riscv32-unknown-elf-gcc: gcc version 15.1.0 (Gentoo 15.1.0 p55)

Using Ibex as a micro controller in an FPGA

**EDA tool and version:**
Xilinx Vivado 2025.1

**Operating system:**
Gentoo

**Version of the Ibex source code:**
git master db07ab174e336d6feb82c96249539badd19f0d6c

no modifications to source

Start with the make run-simple-system target and ibex/examples/sw/simple_system/common/simple_system_common.c:40, then review the reported compiler error and the tool versions from check_tool_requirements.py. Reproduce the failure using the documented setup and determine what change is needed for the simple system to compile with the reported toolchain.

Written by the indexing model from the issue text.