By Chris Dorrell Chipmaker Raspberry Pi is set to raise £166m through its initial public offering (IPO) on the London Stock Exchange in a boost for the capital’s struggling bourse. In an announcement this morning, Raspberry Pi confirmed that its shares had been priced at 280p – right at the top of end of its pricing range – giving the company a market capitalisation of around £541.6m. The firm’s majority shareholder offloaded 45.9m shares while a further 2.1m shares were sold by other shareholders. Another 11.2m shares were issued by Raspberry Pi, raising around £31.4m. In total, the firm rais…