qcacmn: Mark spectral cache valid after writing into it

Setting of any spectral parameter after 'wifi load',
before doing a get operation, is not getting affected.
This is because the current implementation marks the
spectral cache valid only during the read operation.
To fix this, mark the cache valid after write as well.

Change-Id: I53df704e60e29cab7ce7afdd49b917e3482479e5
CRs-Fixed: 2238814

target_if/spectral/target_if_spectral.c

@@ -790,6 +790,10 @@ target_if_spectral_info_write(
 		}
 
 		info->osps_cache.osc_spectral_active = *pval;
+
+		/* The cache is now valid */
+		info->osps_cache.osc_is_valid = 1;
+
 		qdf_spin_unlock(&info->osps_lock);
 		break;
 
@@ -816,6 +820,10 @@ target_if_spectral_info_write(
 		}
 
 		info->osps_cache.osc_spectral_enabled = *pval;
+
+		/* The cache is now valid */
+		info->osps_cache.osc_is_valid = 1;
+
 		qdf_spin_unlock(&info->osps_lock);
 		break;
 
@@ -843,6 +851,10 @@ target_if_spectral_info_write(
 
 		qdf_mem_copy(&info->osps_cache.osc_params,
 			     param, sizeof(info->osps_cache.osc_params));
+
+		/* The cache is now valid */
+		info->osps_cache.osc_is_valid = 1;
+
 		qdf_spin_unlock(&info->osps_lock);
 		break;