ieee80211: share 802.11 unit conversion helpers

MHZ_TO_KHZ, and KHZ_TO_MHZ are useful to drivers and
elsewhere so export these in the common ieee80211 header.
Move the power helpers also because we might as well.
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20200402011810.22947-2-thomas@adapt-ip.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/linux/ieee80211.h

@@ -3330,6 +3330,16 @@ static inline int ieee80211_get_tdls_action(struct sk_buff *skb, u32 hdr_size)
 #define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
 #define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))
 
+/* convert frequencies */
+#define MHZ_TO_KHZ(freq) ((freq) * 1000)
+#define KHZ_TO_MHZ(freq) ((freq) / 1000)
+
+/* convert powers */
+#define DBI_TO_MBI(gain) ((gain) * 100)
+#define MBI_TO_DBI(gain) ((gain) / 100)
+#define DBM_TO_MBM(gain) ((gain) * 100)
+#define MBM_TO_DBM(gain) ((gain) / 100)
+
 /**
  * ieee80211_action_contains_tpc - checks if the frame contains TPC element
  * @skb: the skb containing the frame, length will be checked

include/net/regulatory.h

@@ -231,13 +231,6 @@ struct ieee80211_regdomain {
 	struct ieee80211_reg_rule reg_rules[];
 };
 
-#define MHZ_TO_KHZ(freq) ((freq) * 1000)
-#define KHZ_TO_MHZ(freq) ((freq) / 1000)
-#define DBI_TO_MBI(gain) ((gain) * 100)
-#define MBI_TO_DBI(gain) ((gain) / 100)
-#define DBM_TO_MBM(gain) ((gain) * 100)
-#define MBM_TO_DBM(gain) ((gain) / 100)
-
 #define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags)	\
 {									\
 	.freq_range.start_freq_khz = MHZ_TO_KHZ(start),			\