nvme: Change fail_on_reset to bool

This is safe since sysctl_handle_bool() handles ints transparently.

Sponsored by:	Klara, Inc.
Sponsored by:	NetApp, Inc.
Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D55263

sys/dev/nvme/nvme_private.h

@@ -300,8 +300,8 @@ struct nvme_controller {
 	struct nvme_async_event_request	aer[NVME_MAX_ASYNC_EVENTS];
 
 	uint32_t			is_resetting;
-	u_int				fail_on_reset;
 
+	bool				fail_on_reset;
 	bool				is_failed;
 	bool				is_failed_admin;
 	bool				is_dying;

sys/dev/nvme/nvme_sysctl.c

@@ -425,7 +425,7 @@ nvme_sysctl_initialize_ctrlr(struct nvme_controller *ctrlr)
 	    CTLFLAG_RD, &ctrlr->cap_hi, 0,
 	    "Hi 32-bits of capacities for the drive");
 
-	SYSCTL_ADD_UINT(ctrlr_ctx, ctrlr_list, OID_AUTO, "fail_on_reset",
+	SYSCTL_ADD_BOOL(ctrlr_ctx, ctrlr_list, OID_AUTO, "fail_on_reset",
 	    CTLFLAG_RD, &ctrlr->fail_on_reset, 0,
 	    "Pretend the next reset fails and fail the controller");