b43: HT-PHY: read clip state

We don't know yet when to restore it, implement just reading. We found
out what for are that PHY ops by comparing HT with N code.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/phy_ht.h b/drivers/net/wireless/b43/phy_ht.h
index 0661ae2..6544c42 100644
--- a/drivers/net/wireless/b43/phy_ht.h
+++ b/drivers/net/wireless/b43/phy_ht.h
@@ -19,6 +19,10 @@
 #define B43_PHY_HT_BW5				0x1D2
 #define B43_PHY_HT_BW6				0x1D3
 
+#define B43_PHY_HT_C1_CLIP1THRES		B43_PHY_OFDM(0x00E)
+#define B43_PHY_HT_C2_CLIP1THRES		B43_PHY_OFDM(0x04E)
+#define B43_PHY_HT_C3_CLIP1THRES		B43_PHY_OFDM(0x08E)
+
 #define B43_PHY_HT_RF_SEQ_MODE			B43_PHY_EXTG(0x000)
 #define B43_PHY_HT_RF_SEQ_TRIG			B43_PHY_EXTG(0x003)
 #define  B43_PHY_HT_RF_SEQ_TRIG_RX2TX		0x0001 /* RX2TX */