tools/intel_reg_dumper: retrieve rc6 residency values

This allows to check if rc6 works, and how long have we been in each
state.

Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>

lib/intel_reg.h

@@ -3502,4 +3502,10 @@ typedef enum {
 #define  PORT_DBG_DRRS_HW_STATE_LOW     (1<<30)
 #define  PORT_DBG_DRRS_HW_STATE_HIGH    (2<<30)
 
+/* RC6 residence counters
+ */
+#define RC6_RESIDENCY_TIME          0x138108
+#define RC6p_RESIDENCY_TIME         0x13810C
+#define RC6pp_RESIDENCY_TIME        0x138110
+
 #endif /* _I810_REG_H */

tools/intel_reg_dumper.c

@@ -1694,6 +1694,10 @@ static struct reg_debug ironlake_debug_regs[] = {
 	DEFINEREG(PCH_PP_DIVISOR),
 
 	DEFINEREG2(PORT_DBG, ivb_debug_port),
+
+	DEFINEREG(RC6_RESIDENCY_TIME),
+	DEFINEREG(RC6p_RESIDENCY_TIME),
+	DEFINEREG(RC6pp_RESIDENCY_TIME),
 };
 
 static struct reg_debug i945gm_mi_regs[] = {