samples: dect_phy: dect_shell: fix: mdm deinit() fail halted scheduler

Fixing the case where nrf_modem_dect_phy_deinit failed (-12)
when starting RSSI scan. This caused the scheduler to stay as suspended.
Additionally, adding more CONFIG_NRF_MODEM_LIB_SHMEM_TX_SIZE to
avoid -ENOMEM (-12) failure like this.

Signed-off-by: Jani Hirsimäki <[email protected]>

Author: jhirsi

samples/dect/dect_phy/dect_shell/prj.conf

@@ -69,7 +69,7 @@ CONFIG_ENTROPY_GENERATOR=y
 CONFIG_NRF_MODEM_LIB=y
 CONFIG_NRF_MODEM_LIB_ON_FAULT_APPLICATION_SPECIFIC=y
 CONFIG_NRF_MODEM_LIB_SHMEM_RX_SIZE=6144
-CONFIG_NRF_MODEM_LIB_SHMEM_TX_SIZE=12288
+CONFIG_NRF_MODEM_LIB_SHMEM_TX_SIZE=15360
 
 # Debugging configurations
 CONFIG_ASSERT=y

samples/dect/dect_phy/dect_shell/src/dect/dect_phy_ctrl.c

@@ -1078,6 +1078,9 @@ int dect_phy_ctrl_rssi_scan_start(struct dect_phy_rssi_scan_params *params,
 	if (params->reinit_mdm_api) {
 		ret = dect_phy_ctrl_phy_reinit();
 		if (ret) {
+			if (params->suspend_scheduler) {
+				dect_phy_api_scheduler_resume();
+			}
 			return ret;
 		}
 	}