ASoC: fsl: fsl_ssi: Use '%ld' to print 'long int'

Commit 6873ee46 (ASoC: fsl_ssi: Fix printing return code on clk error) caused
the following build warning:

sound/soc/fsl/fsl_ssi.c: In function 'fsl_ssi_probe':
sound/soc/fsl/fsl_ssi.c:1196:6: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat]

Fix it by using '%ld' to print the 'long int' format.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>