With picolibc moving to using the common malloc implementation, samples and
tests with picolibc-specific settings need to switch to using the common
malloc settings instead.
Signed-off-by: Keith Packard <keithp@keithp.com>
With the minimal C library malloc implementation moving to libc/common, all
of the related Kconfig variables have also changed. Update uses within the
tree.
Signed-off-by: Keith Packard <keithp@keithp.com>