Add privileges for Capi4BSD to control:

- controller reset/firmware loading.
- controller level tracing and tracing of capi messages of applications
  running with different user credentials.

Reviewed by:	rwatson
MFC after:	2 weeks

sys/sys/priv.h

@@ -457,10 +457,16 @@
 #define PRIV_CPUCTL_WRMSR	640	/* Write model-specific register. */
 #define PRIV_CPUCTL_UPDATE	641	/* Update cpu microcode. */
 
+/*
+ * Capi4BSD privileges.
+ */
+#define	PRIV_C4B_RESET_CTLR	650	/* Load firmware, reset controller. */
+#define	PRIV_C4B_TRACE		651	/* Unrestricted CAPI message tracing. */
+
 /*
  * Track end of privilege list.
  */
-#define	_PRIV_HIGHEST		642
+#define	_PRIV_HIGHEST		652
 
 /*
  * Validate that a named privilege is known by the privilege system.  Invalid