ASoC: fsl: mpc5200: signed parameter in snprintf format

cppcheck warning:

sound/soc/fsl/mpc5200_dma.c:414:2: warning: %u in format
string (no. 1) requires 'unsigned int' but the argument type is
'signed int'. [invalidPrintfArgType_uint]
 snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_dma->id);
 ^

Also fix sizeof use, missing parentheses reported by checkpatch.pl

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210219232937.6440-8-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>