nrf/drivers/ble_drv: Fixing sd_ble_enable bug for SD s132 v.2.0.1

Feather52 target which is using SD s132 v.2.0.1 cannot compile
due to variable containing RAM start address is not used.

This patch enables the correct sd_ble_enable variant for this SD.

Author: glennrub

ports/nrf/drivers/bluetooth/ble_drv.c

@@ -196,7 +196,7 @@ uint32_t ble_drv_stack_enable(void) {
 
 #if (BLUETOOTH_SD == 132)
     uint32_t app_ram_start = 0x200039c0;
-#if (BLE_API_VERSION == 3)
+#if (BLE_API_VERSION == 2) || (BLE_API_VERSION == 3)
     err_code = sd_ble_enable(&ble_enable_params, &app_ram_start); // 8K SD headroom from linker script.
 #elif (BLE_API_VERSION >= 4)
     err_code = sd_ble_enable(&app_ram_start); // 8K SD headroom from linker script.