i2c: designware: Move debug print in i2c_dw_isr()

It is kind of needless to print interrupt status when code immediately
after that finds interrupt was not originating from this device.
Therefore move it after spurious interrupt detection.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>