src/topology/parser.c: drop duplicate safe_strtol_base

src/topology/parser.c: drop duplicate safe_strtol_base

The safe_strtol_base() function is defined twice since
	f547b2e3 ("conf: introduce safe_strtol_base()") and
	5fab157a ("topology: do not call strtol directly")
resulting in the following build failure when alsa-utils is built
statically because safe_strtol_base is defined twice.

Fixes: http://autobuild.buildroot.org/results/08d028004090b2a8292f03910cb9bf80a73ac804
Fixes: https://github.com/alsa-project/alsa-lib/pull/207
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>