Add a new NO_REALLOC_IN_PLACE option that disables in-place realloc
optimization. When enabled via CONFIG_SYS_MALLOC_SMALL, realloc() always
allocates new memory, copies data, and frees the old block instead of
trying to extend the existing allocation.
This saves about 500 bytes by eliminating try_realloc_chunk() and
mmap_resize() functions.
When unit tests are enabled, the extra realloc logic is included.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
319350496b