cpu: move exec-all.h inclusion out of cpu.h

exec-all.h contains TCG-specific definitions.  It is not needed outside
TCG-specific files such as translate.c, exec.c or *helper.c.

One generic function had snuck into include/exec/exec-all.h; move it to
include/qom/cpu.h.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target-sparc/cpu.c b/target-sparc/cpu.c
index fe4119e..5b74cfc 100644
--- a/target-sparc/cpu.c
+++ b/target-sparc/cpu.c
@@ -21,6 +21,7 @@
 #include "qapi/error.h"
 #include "cpu.h"
 #include "qemu/error-report.h"
+#include "exec/exec-all.h"
 
 //#define DEBUG_FEATURES