sys/abi_compat.h: move freebsd32_uint64_t and FU64_CP() there

Use private names for uintXX_t types.
Remove conflicting (but equal) PTR_IN() definition from dev/mfi.c.

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D55135

sys/compat/freebsd32/freebsd32.h

@@ -38,24 +38,6 @@
 #include <sys/user.h>
 #include <sys/_ffcounter.h>
 
-/*
- * i386 is the only arch with a 32-bit time_t.
- * Also it is the only arch with (u)int64_t having 4-bytes alignment.
- */
-typedef struct {
-#ifdef __amd64__
-	uint32_t val[2];
-#else
-	uint64_t val;
-#endif
-} freebsd32_uint64_t;
-
-#ifdef __amd64__
-typedef	int32_t	time32_t;
-#else
-typedef	int64_t	time32_t;
-#endif
-
 struct timeval32 {
 	time32_t tv_sec;
 	int32_t tv_usec;

sys/dev/mfi/mfi.c

@@ -3084,8 +3084,6 @@ mfi_user_command(struct mfi_softc *sc, struct mfi_ioc_passthru *ioc)
 	return (error);
 }
 
-#define	PTRIN(p)		((void *)(uintptr_t)(p))
-
 static int
 mfi_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 {

sys/sys/abi_compat.h

@@ -29,10 +29,30 @@
 #ifndef _ABI_COMPAT_H_
 #define	_ABI_COMPAT_H_
 
+#include <sys/_types.h>
+
 /*
- * Helper macros for translating objects between different ABIs.
+ * Helper types and macros for translating objects between different ABIs.
  */
 
+/*
+ * i386 is the only arch with a 32-bit time_t.
+ * Also it is the only arch with (u)int64_t having 4-bytes alignment.
+ */
+typedef struct {
+#ifdef __amd64__
+	__uint32_t val[2];
+#else
+	__uint64_t val;
+#endif
+} freebsd32_uint64_t;
+
+#ifdef __amd64__
+typedef	__int32_t	time32_t;
+#else
+typedef	__int64_t	time32_t;
+#endif
+
 #define	PTRIN(v)	(void *)(uintptr_t)(v)
 #define	PTROUT(v)	(uintptr_t)(v)