exec: Pass CPUState to cpu_reset_interrupt()

Move it to qom/cpu.c to avoid build failures depending on include order
of cpu-qom.h and exec/cpu-all.h.

Change opaques of various ..._irq_handler() functions to the
appropriate CPU type to facilitate using cpu_reset_interrupt().

Fix Coding Style issues while at it (missing braces, indentation).

Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/qom/cpu.c b/qom/cpu.c
index 0aa9be7..e242dcb 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -21,6 +21,11 @@
 #include "qom/cpu.h"
 #include "qemu-common.h"
 
+void cpu_reset_interrupt(CPUState *cpu, int mask)
+{
+    cpu->interrupt_request &= ~mask;
+}
+
 void cpu_reset(CPUState *cpu)
 {
     CPUClass *klass = CPU_GET_CLASS(cpu);