memory: avoid a name clash with access macro

This avoids a name clash with the access macro on windows 64:

make
	CHK version_gen.h
  CC      aarch64-softmmu/memory.o
/home/konrad/qemu/memory.c: In function 'access_with_adjusted_size':
/home/konrad/qemu/memory.c:591:73: error: macro "access" passed 7 arguments, \
                         but takes just 2
                         (size - access_size - i) * 8, access_mask, attrs);
                                                                         ^

Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com>
Message-Id: <1505988260-8483-1-git-send-email-frederic.konrad@adacore.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>