platform/x86: Use strscpy()/scnprintf() with acpi_device_name/class()

platform/x86: Use strscpy()/scnprintf() with acpi_device_name/class()

Replace strcpy() and sprintf() for acpi_device_name/class() targets
with safer variant. In one case, scnprintf() is necessary but the
rest can use strscpy().

Link: https://lore.kernel.org/r/20250407170839.2153-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>