nios2: do not include exec-all.h from cpu.h

exec-all.h contains TCG-specific declarations, it should only be
includer from helper C files.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

target/nios2/cpu.h

@@ -260,7 +260,6 @@ static inline int cpu_interrupts_enabled(CPUNios2State *env)
 }
 
 #include "exec/cpu-all.h"
-#include "exec/exec-all.h"
 
 static inline void cpu_get_tb_cpu_state(CPUNios2State *env, target_ulong *pc,
                                         target_ulong *cs_base, uint32_t *flags)

target/nios2/op_helper.c

@@ -22,6 +22,7 @@
 #include "cpu.h"
 #include "exec/helper-proto.h"
 #include "exec/cpu_ldst.h"
+#include "exec/exec-all.h"
 #include "qemu/main-loop.h"
 
 #if !defined(CONFIG_USER_ONLY)