i2c: i2c-qcom-geni: Check firmware setting before transaction

When enabling the clocks for the core, check that the correct firmware is
loaded before processing the transfer request.

Change-Id: I92ebf77f27b84c1dec8d420d90f369e55d29ea93
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>