wifi: rtl8xxxu: Define masks for cck_agc_rpt bits

Define the constants CCK_AGC_RPT_LNA_IDX_MASK and
CCK_AGC_RPT_VGA_IDX_MASK instead of using the same literals
in four places.

And get the bits from cck_agc_rpt using u8_get_bits().

It's a cosmetic change only.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/cfe79922-efdf-2ed0-7404-263915d19d82@gmail.com

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h

@@ -562,6 +562,9 @@ struct phy_rx_agc_info {
 #endif
 };
 
+#define CCK_AGC_RPT_LNA_IDX_MASK	GENMASK(7, 5)
+#define CCK_AGC_RPT_VGA_IDX_MASK	GENMASK(4, 0)
+
 struct rtl8723au_phy_stats {
 	struct phy_rx_agc_info path_agc[RTL8723A_MAX_RF_PATHS];
 	u8	ch_corr[RTL8723A_MAX_RF_PATHS];

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

@@ -1682,8 +1682,8 @@ static s8 rtl8188f_cck_rssi(struct rtl8xxxu_priv *priv, u8 cck_agc_rpt)
 	s8 rx_pwr_all = 0x00;
 	u8 vga_idx, lna_idx;
 
-	lna_idx = (cck_agc_rpt & 0xE0) >> 5;
-	vga_idx = cck_agc_rpt & 0x1F;
+	lna_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_LNA_IDX_MASK);
+	vga_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_VGA_IDX_MASK);
 
 	switch (lna_idx) {
 	case 7:

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c

@@ -1746,8 +1746,8 @@ static s8 rtl8192e_cck_rssi(struct rtl8xxxu_priv *priv, u8 cck_agc_rpt)
 	u8 vga_idx, lna_idx;
 	s8 lna_gain = 0;
 
-	lna_idx = (cck_agc_rpt & 0xE0) >> 5;
-	vga_idx = cck_agc_rpt & 0x1F;
+	lna_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_LNA_IDX_MASK);
+	vga_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_VGA_IDX_MASK);
 
 	if (priv->cck_agc_report_type == 0)
 		lna_gain = lna_gain_table_0[lna_idx];

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8723b.c

@@ -1680,8 +1680,8 @@ static s8 rtl8723b_cck_rssi(struct rtl8xxxu_priv *priv, u8 cck_agc_rpt)
 	s8 rx_pwr_all = 0x00;
 	u8 vga_idx, lna_idx;
 
-	lna_idx = (cck_agc_rpt & 0xE0) >> 5;
-	vga_idx = cck_agc_rpt & 0x1F;
+	lna_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_LNA_IDX_MASK);
+	vga_idx = u8_get_bits(cck_agc_rpt, CCK_AGC_RPT_VGA_IDX_MASK);
 
 	switch (lna_idx) {
 	case 6: