ath5k: Remove RF5413 from rf gain optimization functions

 * Since RF2413 it seems that RF_BUFFER settings are different (notice
that the last part -"bank 7" or whatever- is smaller than in 5111/5112).
So until we know what's going on we assume there is no gain optimization
stuff in post-5112 chips.

Changes-licensed-under: ISC
Signed-off-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NLuis R. Rodriguez <mcgrof@winlab.rutgers.edu>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/phy.c

@@ -1092,7 +1092,6 @@ static s32 ath5k_hw_rfregs_gain_adjust(struct ath5k_hw *ah)
 		go = &rfgain_opt_5111;
 		break;
 	case AR5K_RF5112:
-	case AR5K_RF5413: /* ??? */
 		go = &rfgain_opt_5112;
 		break;
 	default:
@@ -1557,7 +1556,6 @@ int ath5k_hw_set_rfgain_opt(struct ath5k_hw *ah)
 		ah->ah_gain.g_active = 1;
 		break;
 	case AR5K_RF5112:
-	case AR5K_RF5413: /* ??? */
 		ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default;
 		ah->ah_gain.g_step =
 		    &rfgain_opt_5112.go_step[ah->ah_gain.g_step_idx];