ath11k: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/net/wireless/ath/ath11k/wmi.h:2570:2-3: Unneeded semicolon
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath11k/wmi.h

@@ -2569,7 +2569,7 @@ static inline const char *ath11k_wmi_phymode_str(enum wmi_phy_mode mode)
 		/* no default handler to allow compiler to check that the
 		 * enum is fully handled
 		 */
-	};
+	}
 
 	return "<unknown>";
 }