scsi: core: Update SCSI_MQ_DEFAULT help text to match default

The default was changed, but the help text was not updated.

Fix grammar (s/the option/this option/) while at it.

[mkp: drop "new" as suggested by John Garry]

Fixes: d5038a13ec ("scsi: core: switch to scsi-mq by default")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/Kconfig

@@ -52,12 +52,12 @@ config SCSI_MQ_DEFAULT
 	default y
 	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.
+	  This option enables the blk-mq based I/O path for SCSI devices by
+	  default.  With this 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.
+	  If unsure say Y.
 
 config SCSI_PROC_FS
 	bool "legacy /proc/scsi/ support"