iwlwifi: update iwl-commands.h for 3 stream support

This patch updates comments and constants to support 1, 2, or 3 spatial streams
in rate_n_flags .
Signed-off-by: Daniel Halperin <daniel.c.halperin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-commands.h

@@ -213,10 +213,11 @@ struct iwl_cmd_header {
 } __attribute__ ((packed));
 
 /**
- * 4965 rate_n_flags bit fields
+ * iwlagn rate_n_flags bit fields
  *
- * rate_n_flags format is used in following 4965 commands:
+ * rate_n_flags format is used in following iwlagn commands:
  *  REPLY_RX (response only)
+ *  REPLY_RX_MPDU (response only)
  *  REPLY_TX (both command and response)
  *  REPLY_TX_LINK_QUALITY_CMD
  *
@@ -230,8 +231,9 @@ struct iwl_cmd_header {
  *        6)  54 Mbps
  *        7)  60 Mbps
  *
- *    3:  0)  Single stream (SISO)
+ *  4-3:  0)  Single stream (SISO)
  *        1)  Dual stream (MIMO)
+ *        2)  Triple stream (MIMO)
  *
  *    5:  Value of 0x20 in bits 7:0 indicates 6 Mbps FAT duplicate data
  *
@@ -252,8 +254,8 @@ struct iwl_cmd_header {
  *        110)  11 Mbps
  */
 #define RATE_MCS_CODE_MSK 0x7
-#define RATE_MCS_MIMO_POS 3
-#define RATE_MCS_MIMO_MSK 0x8
+#define RATE_MCS_SPATIAL_POS 3
+#define RATE_MCS_SPATIAL_MSK 0x18
 #define RATE_MCS_HT_DUP_POS 5
 #define RATE_MCS_HT_DUP_MSK 0x20