wifi: mac80211_hwsim: correct MODULE_PARM_DESC of multi_radio

Correct the name field in multi_radio's MODULE_PARM_DESC.

Fixes: d2601e34 ("wifi: mac80211_hwsim: add support for multi-radio wiphy")
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Acked-by: Felix Fietkau <nbd@nbd.name>
Link: https://patch.msgid.link/20240712074938.26437-1-kevin_yang@realtek.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>