scsi: default to scsi-mq

Remove the SCSI_MQ_DEFAULT config option and default to the blk-mq I/O
path now that we had plenty of testing, and have I/O schedulers for
blk-mq.  The module option to disable the blk-mq path is kept around for
now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/Kconfig

@@ -47,17 +47,6 @@ config SCSI_NETLINK
 	default	n
 	depends on NET
 
-config SCSI_MQ_DEFAULT
-	bool "SCSI: use blk-mq I/O path by default"
-	depends on SCSI
-	---help---
-	  This option enables the new blk-mq based I/O path for SCSI
-	  devices by default.  With the option the scsi_mod.use_blk_mq
-	  module/boot option defaults to Y, without it to N, but it can
-	  still be overridden either way.
-
-	  If unsure say N.
-
 config SCSI_PROC_FS
 	bool "legacy /proc/scsi/ support"
 	depends on SCSI && PROC_FS

drivers/scsi/scsi.c

@@ -800,11 +800,7 @@ MODULE_LICENSE("GPL");
 module_param(scsi_logging_level, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(scsi_logging_level, "a bit mask of logging levels");
 
-#ifdef CONFIG_SCSI_MQ_DEFAULT
 bool scsi_use_blk_mq = true;
-#else
-bool scsi_use_blk_mq = false;
-#endif
 module_param_named(use_blk_mq, scsi_use_blk_mq, bool, S_IWUSR | S_IRUGO);
 
 static int __init init_scsi(void)