fw-api: CL 7286950 - update fw common interface files

Change-Id: Iec9db1a510a563322ce8c9b2fefe8eb338eb1e50
WMI: change meaning of PDEV_PARAM OBSS_PD_THRESHOLD value
CRs-Fixed: 2262693

fw/wmi_unified.h

@@ -5872,19 +5872,26 @@ typedef enum {
 
     /* Parameter used to configure OBSS Packet Detect threshold
      * for Spatial Reuse feature.
-     * The accepted values are in between 62 and 95, inclusive.
+     * The accepted values are in between 0x00 and 0xFF, inclusive.
      * The parameter value is programmed into the spatial reuse register,
      * to specify how low the background signal strength from neighboring
      * BSS cells must be, for this AP to employ spatial reuse.
-     * The value of the parameter is multiplied by -1 to get the
-     * OBSS RSSI threshold, in dBm, below which spatial reuse will
-     * be allowed.
-     * For example, if the parameter value is 62, the target will
+     *
+     * The value of the parameter is compared against the OBSS RSSI in dB.
+     * It is a 8-bit value whose
+     * range is -128 to 127 (after two's complement operation).
+     * For example, if the parameter value is 0xF5, the target will
      * allow spatial reuse if the RSSI detected from other BSS
-     * is below -62 dBm.
-     * Similarly, if the parameter value is 80, the target will
+     * is below -10 dB.
+     * Similarly, if the parameter value is 0x0A, the target will
      * allow spatial reuse only if the RSSI detected from neighboring
-     * BSS cells is no more than -80 dBm.
+     * BSS cells is no more than 10 dB.
+     *
+     * bit    | purpose
+     * -------------
+     * 0 - 7  | Param Value
+     * 8 - 30 | reserved
+     * 31     | Enable/Disable. If set to 0, ignore bits 0-7.
      */
     WMI_PDEV_PARAM_SET_CMD_OBSS_PD_THRESHOLD,