platform/mellanox: mlxbf-pmc: Use kstrtobool() to check 0/1 input

For setting the enable value, the input should be 0 or 1 only. Use
kstrtobool() in place of kstrtoint() in mlxbf_pmc_enable_store() to
accept only valid input.

Fixes: 423c3361 ("platform/mellanox: mlxbf-pmc: Add support for BlueField-3")
Signed-off-by: Shravan Kumar Ramani <shravankr@nvidia.com>
Reviewed-by: David Thompson <davthompson@nvidia.com>
Link: https://lore.kernel.org/r/2ee618c59976bcf1379d5ddce2fc60ab5014b3a9.1751380187.git.shravankr@nvidia.com


[ij: split kstrbool() change to own commit.]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>