Remove exec-all.h include directives

Most exec-all.h include directives are now useless, remove them.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/target-sparc/machine.c b/target-sparc/machine.c
index bae23c5..56ae041 100644
--- a/target-sparc/machine.c
+++ b/target-sparc/machine.c
@@ -2,7 +2,7 @@
 #include "hw/boards.h"
 #include "qemu-timer.h"
 
-#include "exec-all.h"
+#include "cpu.h"
 
 void cpu_save(QEMUFile *f, void *opaque)
 {