IB/qib: Clear 6120 hardware error register

The hardware error register needs to be cleared or another interrupt
will be generated, thus causing an infinite loop.  This is a
regression introduced when removing debug output.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/qib/qib_iba6120.c

@@ -1355,8 +1355,7 @@ static int qib_6120_bringup_serdes(struct qib_pportdata *ppd)
 	hwstat = qib_read_kreg64(dd, kr_hwerrstatus);
 	if (hwstat) {
 		/* should just have PLL, clear all set, in an case */
-		if (hwstat & ~QLOGIC_IB_HWE_SERDESPLLFAILED)
-			qib_write_kreg(dd, kr_hwerrclear, hwstat);
+		qib_write_kreg(dd, kr_hwerrclear, hwstat);
 		qib_write_kreg(dd, kr_errclear, ERR_MASK(HardwareErr));
 	}