When building with GCC 15.2 the following warning show up:
scripts/dtc/libfdt/fdt_overlay.c:422:21: warning:
assignment discards ‘const’ qualifier from pointer target type
[-Wdiscarded-qualifiers]
422 | sep = memchr(fixup_str, ':', fixup_len);
| ^
scripts/dtc/libfdt/fdt_overlay.c:432:21: warning:
assignment discards ‘const’ qualifier from pointer target type
[-Wdiscarded-qualifiers]
432 | sep = memchr(name, ':', fixup_len);
| ^
Define sep as const char *.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>