add USB, add proper _LAST, and verify range, support void functions

sysinit.h

@@ -71,6 +71,7 @@ enum sysinit_sub_id {
 
 	SI_SUB_HAL		= 0x0010,	/* Early HAL init */
 	SI_SUB_GPIO		= 0x0030,	/* Early GPIO */
+	SI_SUB_USB		= 0x0300,	/* USB */
 	SI_SUB_CONSOLE		= 0x0700,	/* Setup console/debug prints */
 
 	SI_SUB_COPYRIGHT	= 0x0800,	/* start of when printf works */
@@ -93,7 +94,8 @@ enum sysinit_elem_order {
 	SI_ORDER_SEVENTH	= 0x0006,	/* seventh*/
 	SI_ORDER_EIGHTH		= 0x0007,	/* eighth*/
 	SI_ORDER_MIDDLE		= 0x1000,	/* somewhere in the middle */
-	SI_ORDER_ANY		= 0xffff	/* last*/
+	SI_ORDER_ANY		= 0xfffe,	/* second to last */
+	SI_ORDER_LAST		= 0xffff	/* last*/
 };
 
 typedef void (*sysinit_cfunc_t)(const void *);
@@ -105,14 +107,16 @@ struct sysinit {
 };
 
 #define SYSINIT(uniquifier, subsystem, order, func, udata)		\
-	CTASSERT((subsystem & 0xffff) == subsystem);			\
-	CTASSERT((order & 0xffff) == order);				\
+	CTASSERT(((subsystem) & 0xffff) == (subsystem));		\
+	CTASSERT(((order) & 0xffff) == (order));			\
 	static const struct sysinit uniquifier ## _sys_init = {		\
 		.si_subsys_order = MAKE_SUBORDER((subsystem), (order)),	\
 		.si_func = (func),					\
 		.si_udata = (udata),					\
 	};								\
 	DATA_SET(sysinit_set,uniquifier ## _sys_init)
+#define SYSINIT_VF(uniquifier, subsystem, order, func)			\
+	SYSINIT(uniquifier, (subsystem), (order), (void (*)(const void *))(func), NULL)
 
 void sysinit_run(void);