sim: fix compilation on mingw64 [PR sim/28476]

...by reordering includes.

1. sim-utils.c

sim/mips/sim-main.h defines UserMode, while there is a struct in winnt.h
which has UserMode as a member. So if sim-main.h is included before winnt.h,
compilation fails.

2. ppc

registers.h defines CR, which is used as a member in winnt.h.

winsock2.h is included by sys/time.h, so sys/time.h has to be included
before registers.h.

Bug: https://sourceware.org/PR28476

sim/common/sim-utils.c

@@ -20,9 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 /* This must come before any other includes.  */
 #include "defs.h"
 
-#include "sim-main.h"
-#include "sim-assert.h"
-
 #include <stdlib.h>
 #include <time.h>
 #include <sys/time.h> /* needed by sys/resource.h */
@@ -34,6 +31,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libiberty.h"
 #include "bfd.h"
+#include "sim-main.h"
+#include "sim-assert.h"
 #include "sim-utils.h"
 
 /* Allocate zero filled memory with xcalloc - xcalloc aborts if the

sim/ppc/emul_netbsd.c

@@ -25,8 +25,7 @@
 /* Note: this module is called via a table.  There is no benefit in
    making it inline */
 
-#include "emul_generic.h"
-#include "emul_netbsd.h"
+#include "defs.h"
 
 #include <string.h>
 #include <sys/types.h>
@@ -38,6 +37,9 @@
 #include <sys/param.h>
 #include <sys/time.h>
 
+#include "emul_generic.h"
+#include "emul_netbsd.h"
+
 #ifdef HAVE_GETRUSAGE
 #ifndef HAVE_SYS_RESOURCE_H
 #undef HAVE_GETRUSAGE

sim/ppc/emul_unix.c

@@ -25,8 +25,7 @@
 /* Note: this module is called via a table.  There is no benefit in
    making it inline */
 
-#include "emul_generic.h"
-#include "emul_unix.h"
+#include "defs.h"
 
 #include <string.h>
 #ifdef HAVE_SYS_TYPES_H
@@ -124,6 +123,9 @@ int getrusage();
 #include <stdlib.h>
 #include <time.h>
 
+#include "emul_generic.h"
+#include "emul_unix.h"
+
 #ifndef STATIC_INLINE_EMUL_UNIX
 #define STATIC_INLINE_EMUL_UNIX STATIC_INLINE
 #endif

sim/ppc/mon.c

@@ -21,9 +21,8 @@
 #ifndef _MON_C_
 #define _MON_C_
 
-#include "basics.h"
-#include "cpu.h"
-#include "mon.h"
+#include "defs.h"
+
 #include <stdio.h>
 
 #include <string.h>
@@ -42,6 +41,10 @@
 int getrusage();
 #endif
 
+#include "basics.h"
+#include "cpu.h"
+#include "mon.h"
+
 #define MAX_BYTE_READWRITE 9
 #define MAX_SHIFT_READWRITE 3