w1: ds28e17: Replace deprecated strcpy + strcat in w1_f19_add_slave

strcpy() is deprecated and using strcat() is discouraged. Replace them with
scnprintf().  No functional changes.

Link: https://github.com/KSPP/linux/issues/88
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
1 file changed