Fix build under -CURRENT following Sr329824.

This commit does not address big endian support, which will be addressed
by a separate revision and commit. This commit (and revision) only
addresses build breakage due to Sr329824.

Approved by:	imp, wma, kan, mst_semihalf.com (Michal Stanek)
Differential Revision:	https://reviews.freebsd.org/D14483

sysutils/smartmontools/files/patch-freebsd__nvme__ioctl.h

@@ -0,0 +1,13 @@
+--- freebsd_nvme_ioctl.h.orig	2017-09-20 10:34:38.000000000 -0700
++++ freebsd_nvme_ioctl.h	2018-02-22 23:04:32.250104000 -0800
+@@ -148,8 +148,10 @@
+ #include <dev/nvme/nvme.h>
+ #endif
+ 
++#if __FreeBSD_version < 1200058
+ #define nvme_completion_is_error(cpl)					\
+ 	((cpl)->status.sc != 0 || (cpl)->status.sct != 0)
++#endif
+ 
+ #define NVME_CTRLR_PREFIX	"/dev/nvme"
+ #define NVME_NS_PREFIX		"ns"

sysutils/smartmontools/files/patch-os__freebsd.cpp

@@ -1,6 +1,14 @@
---- os_freebsd.cpp.orig	2017-04-24 16:34:16 UTC
-+++ os_freebsd.cpp
-@@ -484,7 +484,7 @@ bool freebsd_nvme_device::open()
+--- os_freebsd.cpp.orig	2017-04-24 09:34:16.000000000 -0700
++++ os_freebsd.cpp	2018-02-22 23:01:44.118712000 -0800
+@@ -15,6 +15,7 @@
+  *
+  */
+ 
++#include <sys/param.h>
+ #include <stdio.h>
+ #include <sys/types.h>
+ #include <dirent.h>
+@@ -484,7 +485,7 @@
    	}
    	nsid = 0xFFFFFFFF; // broadcast id
    }
@@ -9,3 +17,16 @@
    	&ctrlid, &nsid, &tmp) == 2) 
    {
    	if(ctrlid < 0 || nsid < 0) {
+@@ -521,7 +522,11 @@
+   struct nvme_pt_command pt;
+   memset(&pt, 0, sizeof(pt));
+ 
+-  pt.cmd.opc = in.opcode;
++#if __FreeBSD_version >= 1200058
++  pt.cmd.opc_fuse = NVME_CMD_SET_OPC(in.opcode);
++#else
++  pt.cmd.opc_fuse = in.opcode;
++#endif
+   pt.cmd.nsid = in.nsid;
+   pt.buf = in.buffer;
+   pt.len = in.size;