ath5k: fix hw rate index condition

Make sure we print out a warning when the index is out of bounds,
i.e. even on hw_rix == AR5K_MAX_RATES.

Also change to WARN and print text with the reported hw_rix.

Signed-off-by: Jiri Slaby <[e-mail]>
Cc: Nick Kossifidis <[e-mail]>
Cc: Luis R. Rodriguez <[e-mail]>
Cc: Bob Copeland <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/ath5k/base.c

···
 static inline int
 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
 {
-	WARN_ON(hw_rix < 0 || hw_rix > AR5K_MAX_RATES);
+	WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
+			"hw_rix out of bounds: %x\n", hw_rix);
 	return sc->rate_idx[sc->curband->band][hw_rix];
 }