wifi: rtl8xxxu: Rename rtl8xxxu_8188f_channel_to_group

This name is an anomaly. Change it to rtl8188f_channel_to_group to
follow the same pattern as the other functions.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Acked-by: Jes Sorensen <jes@trained-monkey.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/ba8e3ea2-74f5-e1db-296e-4ae5f03084dc@gmail.com

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188f.c

@@ -352,7 +352,7 @@ static int rtl8188fu_identify_chip(struct rtl8xxxu_priv *priv)
 	return ret;
 }
 
-static void rtl8xxxu_8188f_channel_to_group(int channel, int *group, int *cck_group)
+static void rtl8188f_channel_to_group(int channel, int *group, int *cck_group)
 {
 	if (channel < 3)
 		*group = 0;
@@ -378,7 +378,7 @@ rtl8188f_set_tx_power(struct rtl8xxxu_priv *priv, int channel, bool ht40)
 	u8 cck, ofdmbase, mcsbase;
 	int group, cck_group;
 
-	rtl8xxxu_8188f_channel_to_group(channel, &group, &cck_group);
+	rtl8188f_channel_to_group(channel, &group, &cck_group);
 
 	cck = priv->cck_tx_power_index_A[cck_group];