qcacmn: Share Spectral HW gen as part of capability exchange

Spectral scan period is not in terms of tclk periods for
generation 3 Spectral HW. It is directly in micro seconds.
Default value is 224 us. Driver needs to use 224 us as
default value. Application needs to display the unit as
tclk period till generation II and micro second for
generation III. For this driver will be sharing the
Spectral HW generation info to application as part of
the capability exchange.

CRs-Fixed: 2225740
Change-Id: Iaeda8ebb77c2a39824b5f919e8578ff4d56c1aa5

spectral/dispatcher/inc/wlan_spectral_public_structs.h

@@ -102,7 +102,9 @@
 #define SPECTRAL_SCAN_ACTIVE_DEFAULT           (0)
 #define SPECTRAL_SCAN_ENABLE_DEFAULT           (0)
 #define SPECTRAL_SCAN_COUNT_DEFAULT            (0)
-#define SPECTRAL_SCAN_PERIOD_DEFAULT           (35)
+#define SPECTRAL_SCAN_PERIOD_GEN_I_DEFAULT     (35)
+#define SPECTRAL_SCAN_PERIOD_GEN_II_DEFAULT    (35)
+#define SPECTRAL_SCAN_PERIOD_GEN_III_DEFAULT   (224)
 #define SPECTRAL_SCAN_PRIORITY_DEFAULT         (1)
 #define SPECTRAL_SCAN_FFT_SIZE_DEFAULT         (7)
 #define SPECTRAL_SCAN_GC_ENA_DEFAULT           (1)
@@ -228,12 +230,14 @@ struct spectral_diag_stats {
  * @radar_cap:           Radar detection capability
  * @spectral_cap:        Spectral capability
  * @advncd_spectral_cap: Advanced spectral capability
+ * @hw_gen: Spectral hw generation
  */
 struct spectral_caps {
 	uint8_t phydiag_cap;
 	uint8_t radar_cap;
 	uint8_t spectral_cap;
 	uint8_t advncd_spectral_cap;
+	uint32_t hw_gen;
 };
 
 /**