target/m68k/fpu_helper.c: rename the access arguments

The "access" arguments clash with a macro under Windows with MinGW:
  CC      m68k-softmmu/target/m68k/fpu_helper.o
  target/m68k/fpu_helper.c: In function 'fmovem_predec':
  target/m68k/fpu_helper.c:405:56: error: macro "access" passed 4 arguments,
   but takes just 2
               size = access(env, addr, &env->fregs[i], ra);

So this renames them access_fn.

Tested with:
 ./configure --target-list=m68k-softmmu
 make -j8
Signed-off-by: NKONRAD Frederic <frederic.konrad@adacore.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NLaurent Vivier <laurent@vivier.eu>
Message-Id: <1568296920-29939-1-git-send-email-frederic.konrad@adacore.com>
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>

target/m68k/fpu_helper.c

@@ -396,14 +396,14 @@ typedef int (*float_access)(CPUM68KState *env, uint32_t addr, FPReg *fp,
                             uintptr_t ra);
 
 static uint32_t fmovem_predec(CPUM68KState *env, uint32_t addr, uint32_t mask,
-                               float_access access)
+                              float_access access_fn)
 {
     uintptr_t ra = GETPC();
     int i, size;
 
     for (i = 7; i >= 0; i--, mask <<= 1) {
         if (mask & 0x80) {
-            size = access(env, addr, &env->fregs[i], ra);
+            size = access_fn(env, addr, &env->fregs[i], ra);
             if ((mask & 0xff) != 0x80) {
                 addr -= size;
             }
@@ -414,14 +414,14 @@ static uint32_t fmovem_predec(CPUM68KState *env, uint32_t addr, uint32_t mask,
 }
 
 static uint32_t fmovem_postinc(CPUM68KState *env, uint32_t addr, uint32_t mask,
-                               float_access access)
+                               float_access access_fn)
 {
     uintptr_t ra = GETPC();
     int i, size;
 
     for (i = 0; i < 8; i++, mask <<= 1) {
         if (mask & 0x80) {
-            size = access(env, addr, &env->fregs[i], ra);
+            size = access_fn(env, addr, &env->fregs[i], ra);
             addr += size;
         }
     }