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/arch/x86/guest/vm.c

@@ -37,6 +37,7 @@
 #include <assign.h>
 #include <vgpio.h>
 #include <rtcm.h>
+#include <arch/x86/irq.h>
 
 /* Local variables */