wil6210: map MAC timer for packet lifetime into debugfs

expose reading RGF_MAC_MTRL_COUNTER_0 in debugfs

Signed-off-by: Dedy Lansky <qca_dlansky@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 67e9624..077e623 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -133,6 +133,9 @@
 #define RGF_HP_CTRL			(0x88265c)
 #define RGF_PCIE_LOS_COUNTER_CTL	(0x882dc4)
 
+/* MAC timer, usec, for packet lifetime */
+#define RGF_MAC_MTRL_COUNTER_0		(0x886aa8)
+
 /* popular locations */
 #define HOST_MBOX   HOSTADDR(RGF_USER_USER_SCRATCH_PAD)
 #define HOST_SW_INT (HOSTADDR(RGF_USER_USER_ICR) + \