OPP: ti: Fix ti_opp_supply_probe wrong return values

[ Upstream commit 3a1ac6b8 ]

Function ti_opp_supply_probe() since commit 6baee034 ("OPP: ti:
Migrate to dev_pm_opp_set_config_regulators()") returns wrong values
when all goes well and hence driver probing eventually fails.

Fixes: 6baee034 ("OPP: ti: Migrate to dev_pm_opp_set_config_regulators()")
Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>