Replace custom and non-portable implementation of COUNT_ARGS().

Fixes: 4e60a956 ("interconnect: qcom: add msm8974 driver")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230920154131.2071112-1-andriy.shevchenko@linux.intel.comSigned-off-by: Georgi Djakov <djakov@kernel.org>