topology: use snd_config_get_llong() in tplg_get_integer/unsigned()

topology: use snd_config_get_llong() in tplg_get_integer/unsigned()

Replace the per-type INTEGER/INTEGER64/STRING parsing in both
functions with the new snd_config_get_llong() helper.

In tplg_get_unsigned(), the string path now goes through
safe_strtoll_base() instead of strtoul(); a negative value still
wraps to the same unsigned result via the existing wraparound check,
and values within the UINT_MAX range never overflow long long.

In tplg_get_integer(), INTEGER64 config nodes are now also accepted
(previously rejected), subject to the same INT_MIN/INT_MAX range
check as before.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>