BERLIN (Reuters) - The chief executive of Sweden's Ericsson will meet German Chancellor Angela Merkel next week, a government spokesman said on Friday, amid debate in Berlin over how best to regulate foreign providers of telecoms equipment.Borje Ekholm's meeting on Feb. 13 comes amid calls from some German lawmakers to ban China's Huawei [HWT.UL], the global leader in telecoms networks, on national security grounds.Sources earlier said Finland's Nokia would also send a representative to meet..