platform/mellanox: mlxbf-pmc: incorrect type in assignment

platform/mellanox: mlxbf-pmc: incorrect type in assignment

Fix sparse warnings:
expected 'void __iomem *addr', but got 'void *addr'

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202411121935.cgFcEMO4-lkp@intel.com/
Fixes: 423c3361855c ("platform/mellanox: mlxbf-pmc: Add support for BlueField-3")
Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
Reviewed-by: David Thompson <davthompson@nvidia.com>
Link: https://lore.kernel.org/r/fece26ad40620b1e0beb733b9bba3de3ce325761.1732088929.git.xiaopei01@kylinos.cn
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>