Enable CONFIG_MAC80211_HWSIM=m on x86 (config-wsl) to match arm64

@chessturo is already working on this.

Since Jul 28, 2026.

**Is your feature request related to a problem? Please describe.**
The x86_64 WSL2 kernel can't load `mac80211_hwsim`, which blocks virtual-radio Wi-Fi userspace testing (`nl80211` / `wpa_supplicant` / `hostapd` / `iw`). The rest of the stack is already present: `CONFIG_MODULES=y`, `CONFIG_CFG80211=m`, `CONFIG_MAC80211=m`, `CONFIG_WLAN=y`. Notably, `config-wsl-arm64` already sets `CONFIG_MAC80211_HWSIM=m`, so this looks like an unintended x86/arm64 config inconsistency rather than a deliberate exclusion.

**Describe the solution you'd like**
Bring x86 to parity with arm64 by setting the option in `arch/x86/configs/config-wsl`:

```diff
diff --git a/arch/x86/configs/config-wsl b/arch/x86/configs/config-wsl
index 61f65876cbb7..3d4f8a00b862 100755
--- a/arch/x86/configs/config-wsl
+++ b/arch/x86/configs/config-wsl
@@ -3249,7 +3249,7 @@ CONFIG_WLAN_VENDOR_ZYDAS=y
# CONFIG_ZD1211RW is not set
CONFIG_WLAN_VENDOR_QUANTENNA=y
# CONFIG_QTNFMAC_PCIE is not set
-# CONFIG_MAC80211_HWSIM is not set
+CONFIG_MAC80211_HWSIM=m
# CONFIG_VIRT_WIFI is not set
# CONFIG_WAN is not set
```

**Describe alternatives you've considered**
- Building a custom WSL2 kernel with the option enabled: every WSL user who wants virtual-radio testing then has to maintain a private kernel + `.wslconfig kernel=` override that a WSL kernel update silently reverts.
- Out-of-tree `mac80211_hwsim.ko`: not viable; WSL ships no `/lib/modules/$(uname -r)/build` tree and vermagic must match.

**Additional context**
Concrete consumer: the Zephyr RTOS `native_sim` Wi-Fi driver (https://github.com/zephyrproject-rtos/zephyr/pull/110681) drives a `mac80211_hwsim` radio via host `nl80211`; on x86_64 WSL2 this missing module is the only blocker.