hv/mod_irq: do not include x86/irq.h in common/irq.h

Each .c file includes the arch specific irq header file (with full
path) by itself if required.

Tracked-On: #5825
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>

hypervisor/common/schedule.c

@@ -12,6 +12,7 @@
 #include <lapic.h>
 #include <schedule.h>
 #include <sprintf.h>
+#include <arch/x86/irq.h>
 
 bool is_idle_thread(const struct thread_object *obj)
 {