target/hppa: Only set PSW 'M' bit on reset

On reset:

  "All PSW bits except the M bit is reset. The M bit is set."

Commit 1a19da0 ("target/hppa: Fill in hppa_cpu_do_interrupt /
hppa_cpu_exec_interrupt") inadvertently set the W bit at RESET,
remove it and set the M bit.

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Acked-by: Helge Deller <[email protected]>
Message-Id: <[email protected]>

Author: philmd

target/hppa/cpu.c

@@ -209,7 +209,7 @@ static void hppa_cpu_reset_hold(Object *obj, ResetType type)
     memset(env, 0, offsetof(CPUHPPAState, end_reset_fields));
 
     cpu_hppa_loaded_fr0(env);
-    cpu_hppa_put_psw(env, PSW_W);
+    cpu_hppa_put_psw(env, PSW_M);
 }
 
 static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model)