You've available ticket from Hosur to Kalyan and wanted to change boarding point to SBC means you're planning to travel by 11014. It is not possible because the quotas are different for HSRA and SBC. However, the easy solution is, book your tickets as you have planned and need not to change your BP. This train stops either side while entering and coming out from SBC. So just get into the Bangalore cantonment station and catch this train before it enters to SBC and get your tickets checked with TTE. This is a normal routine followed by many passengers I have seen in last 5 years. Not to worry much about this.