platform/mellanox: Add static in struct declaration.

Fix problem of missing static in struct declaration.

Fixes: 662f24826f ("platform/mellanox: Add support for new SN2201 system")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Michael Shych <michaelsh@nvidia.com>
Link: https://lore.kernel.org/r/20220602145103.11859-1-michaelsh@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/mellanox/nvsw-sn2201.c

@@ -326,7 +326,7 @@ static struct resource nvsw_sn2201_lpc_res[] = {
 };
 
 /* SN2201 I2C platform data. */
-struct mlxreg_core_hotplug_platform_data nvsw_sn2201_i2c_data = {
+static struct mlxreg_core_hotplug_platform_data nvsw_sn2201_i2c_data = {
 	.irq = NVSW_SN2201_CPLD_SYSIRQ,
 };