wifi: rtw89: correct unit for port offset and refine macro

Strictly speaking, the unit of the offset should be TU instead of ms.
So, correct it and the macro for calculation. Then, to make the macro
generic, the factor n is moved outside.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230119062453.58341-2-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/mac.c

@@ -3930,10 +3930,12 @@ static void rtw89_mac_port_tsf_sync(struct rtw89_dev *rtwdev,
 
 	/* adjust offset randomly to avoid beacon conflict */
 	offset = offset - offset / 4 + get_random_u32() % (offset / 2);
-	val = RTW89_PORT_OFFSET_MS_TO_32US((*n_offset)++, offset);
+	val = (*n_offset) * RTW89_PORT_OFFSET_TU_TO_32US(offset);
 	reg = rtw89_mac_reg_by_idx(R_AX_PORT0_TSF_SYNC + rtwvif->port * 4,
 				   rtwvif->mac_idx);
 
+	(*n_offset)++;
+
 	rtw89_write32_mask(rtwdev, reg, B_AX_SYNC_PORT_SRC, rtwvif_src->port);
 	rtw89_write32_mask(rtwdev, reg, B_AX_SYNC_PORT_OFFSET_VAL, val);
 	rtw89_write32_set(rtwdev, reg, B_AX_SYNC_NOW);

drivers/net/wireless/realtek/rtw89/mac.h

@@ -168,7 +168,7 @@ enum rtw89_mac_ax_l0_to_l1_event {
 	MAC_AX_L0_TO_L1_EVENT_MAX = 15,
 };
 
-#define RTW89_PORT_OFFSET_MS_TO_32US(n, shift_ms) ((n) * (shift_ms) * 1000 / 32)
+#define RTW89_PORT_OFFSET_TU_TO_32US(shift_tu) ((shift_tu) * 1024 / 32)
 
 enum rtw89_mac_dbg_port_sel {
 	/* CMAC 0 related */