b43: remove set but not used variables 'tx_pwr_state,tmp2'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/wireless/broadcom/b43/phy_n.c: In function 'b43_nphy_op_recalc_txpower':
drivers/net/wireless/broadcom/b43/phy_n.c:5898:7: warning:
variable 'tx_pwr_state' set but not used [-Wunused-but-set-variable]

drivers/net/wireless/broadcom/b43/phy_n.c:6047:20: warning:
variable 'tmp2' set but not used [-Wunused-but-set-variable]

'tx_pwr_state' never used since introduction in commit
8615eb2870f1 ("b43: N-PHY: support setting custom TX power")

'tmp2' not used any more since commit c002831a07dd ("b43: N-PHY: use helper
for checking IPA")

Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>

drivers/net/wireless/broadcom/b43/phy_n.c

···
 	struct ieee80211_channel *channel = dev->wl->hw->conf.chandef.chan;
 	struct b43_ppr *ppr = &nphy->tx_pwr_max_ppr;
 	u8 max; /* qdBm */
-	bool tx_pwr_state;
 
 	if (nphy->tx_pwr_last_recalc_freq == channel->center_freq &&
 	    nphy->tx_pwr_last_recalc_limit == phy->desired_txpower)
···
 	b43_ppr_apply_min(dev, ppr, INT_TO_Q52(8));
 
 	/* Apply */
-	tx_pwr_state = nphy->txpwrctrl;
 	b43_mac_suspend(dev);
 	b43_nphy_tx_power_ctl_setup(dev);
 	if (dev->dev->core_rev == 11 || dev->dev->core_rev == 12) {
···
 	u8 tx_pwr_state;
 	struct nphy_txgains target;
 	u16 tmp;
-	enum nl80211_band tmp2;
 	bool do_rssi_cal;
 
 	u16 clip[2];
···
 		b43_phy_write(dev, B43_NPHY_DUP40_BL, 0x9A4);
 	}
 
-	tmp2 = b43_current_band(dev->wl);
 	if (b43_nphy_ipa(dev)) {
 		b43_phy_set(dev, B43_NPHY_PAPD_EN0, 0x1);
 		b43_phy_maskset(dev, B43_NPHY_EPS_TABLE_ADJ0, 0x007F,