ide: Increase WAIT_DRQ to accomodate some CF cards and SSD drives.

Based upon a patch by Philippe De Muyter, and feedback from Mark
Lord and Robert Hancock.

As noted by Mark Lord, the outdated ATA1 spec specifies a 20msec
timeout for setting DRQ but lots of common devices overshoot this.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/ide.h

@@ -125,8 +125,8 @@ struct ide_io_ports {
  * Timeouts for various operations:
  */
 enum {
-	/* spec allows up to 20ms */
-	WAIT_DRQ	= HZ / 10,	/* 100ms */
+	/* spec allows up to 20ms, but CF cards and SSD drives need more */
+	WAIT_DRQ	= 1 * HZ,	/* 1s */
 	/* some laptops are very slow */
 	WAIT_READY	= 5 * HZ,	/* 5s */
 	/* should be less than 3ms (?), if all ATAPI CD is closed at boot */