spi: dw: print debug message with FIFO size

When autodetection is used it would be useful to know what the FIFO size is.
The patch adds a debug message for this purpose.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --cc drivers/spi/spi-dw.c
Simple merge