qemu-common: push cpu.h inclusion out of qemu-common.h

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index 669e82a..4d584ef 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -13,6 +13,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
+#include "cpu.h"
 #include "hw/sysbus.h"
 #include "qemu/timer.h"
 #include "hw/arm/arm.h"