The SH4 FSI sound drivers use SuperH clocks thus they cannot be built on
platforms without proper clock support (e.g. compile test on MIPS with
RALINK and SOC_RT305X):

    /usr/bin/mips-linux-gnu-ld: sound/soc/sh/fsi.o: in function `fsi_clk_set_rate_external':
    fsi.c:(.text+0x2714): undefined reference to `clk_set_parent'
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201116175133.402553-2-krzk@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>