nvme: Minor style(9) fixes

<sys/systm.h> needs to be first after <sys/param.h>. And we don't need
both sys/param.h and sys/types.h.

Fixes:		032fbda024
Sponsored by:	Netflix

sys/dev/nvme/nvme.h

@@ -29,15 +29,13 @@
 #ifndef __NVME_H__
 #define __NVME_H__
 
-#ifdef _KERNEL
-#include <sys/types.h>
-#endif
-
 #include <sys/param.h>
-#include <sys/endian.h>
-#ifndef _KERNEL
+#ifdef _KERNEL
+#include <sys/systm.h>
+#else
 #include <stdbool.h>
 #endif
+#include <sys/endian.h>
 
 struct sbuf;
 
@@ -1909,7 +1907,6 @@ void	nvme_sc_sbuf(const struct nvme_completion *cpl, struct sbuf *sbuf);
 void	nvme_strvis(uint8_t *dst, const uint8_t *src, int dstlen, int srclen);
 
 #ifdef _KERNEL
-#include <sys/systm.h>
 #include <sys/disk.h>
 
 struct bio;