ASoc: fix sound/soc/intel/skylake/slk-ssp-clk.c build error on IA64

ASoc: fix sound/soc/intel/skylake/slk-ssp-clk.c build error on IA64

skl-ssp-clk.c does not build on IA64 because the driver
uses the common clock interface, so make the driver depend
on COMMON_CLK.

Fixes this build error:
../sound/soc/intel/skylake/skl-ssp-clk.c:26:16: error: field 'hw' has incomplete type
  struct clk_hw hw;
                ^~
[Corrections for SKL support by Pierre Bossart]

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Cc: Jie Yang <yang.jie@linux.intel.com>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Mark Brown <broonie@kernel.org>