rtw88: change max_num_of_tx_queue() definition to inline in pci.h

It's more reasonable to define max_num_of_tx_queue() as an inline function.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/pci.h

@@ -210,7 +210,7 @@ struct rtw_pci {
 	void __iomem *mmap;
 };
 
-static u32 max_num_of_tx_queue(u8 queue)
+static inline u32 max_num_of_tx_queue(u8 queue)
 {
 	u32 max_num;