b43: N-PHY: enable forgotten write of hw power adjust table

We've implemented table calculation, but forgot to enable writing it in
power setup function.
By the way document table layout.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/phy_n.c

@@ -3400,6 +3400,20 @@ static void b43_nphy_tx_prepare_adjusted_power_table(struct b43_wldev *dev)
 	u8 idx, delta;
 	u8 i, stf_mode;
 
+	/* Array adj_pwr_tbl corresponds to the hardware table. It consists of
+	 * 21 groups, each containing 4 entries.
+	 *
+	 * First group has entries for CCK modulation.
+	 * The rest of groups has 1 entry per modulation (SISO, CDD, STBC, SDM).
+	 *
+	 * Group 0 is for CCK
+	 * Groups 1..4 use BPSK (group per coding rate)
+	 * Groups 5..8 use QPSK (group per coding rate)
+	 * Groups 9..12 use 16-QAM (group per coding rate)
+	 * Groups 13..16 use 64-QAM (group per coding rate)
+	 * Groups 17..20 are unknown
+	 */
+
 	for (i = 0; i < 4; i++)
 		nphy->adj_pwr_tbl[i] = nphy->tx_power_offset[i];
 
@@ -3598,10 +3612,8 @@ static void b43_nphy_tx_power_ctl_setup(struct b43_wldev *dev)
 	}
 
 	b43_nphy_tx_prepare_adjusted_power_table(dev);
-	/*
 	b43_ntab_write_bulk(dev, B43_NTAB16(26, 64), 84, nphy->adj_pwr_tbl);
 	b43_ntab_write_bulk(dev, B43_NTAB16(27, 64), 84, nphy->adj_pwr_tbl);
-	*/
 
 	if (nphy->hang_avoid)
 		b43_nphy_stay_in_carrier_search(dev, false);