checkpatch: Ignore str* warnings

Ignore STRCPY and STRNCPY warning for `checkpatch.pl`.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

.checkpatch.conf

@@ -29,3 +29,7 @@
 # Ignore ARRAY_SIZE, let `sizeof()` be used to determine array size.
 # This makes the code compatible with other compilers / environments.
 --ignore ARRAY_SIZE
+
+# Ignore STRCPY, STRNCPY warnings.
+--ignore STRCPY
+--ignore STRNCPY