soc/tegra: pmc: Fix sparse warning for tegra_pmc_init_tsense_reset()

Sparse reports the following warning for tegra_pmc_init_tsense_reset():

drivers/soc/tegra/pmc.c:741:6: warning: symbol 'tegra_pmc_init_tsense_reset' was not declared. Should it be static?

This function is only used internally by the PMC driver and so fix this
by making it static.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/pmc.c

@@ -729,7 +729,7 @@ static void tegra_pmc_init(struct tegra_pmc *pmc)
 	tegra_pmc_writel(value, PMC_CNTRL);
 }
 
-void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
+static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
 {
 	static const char disabled[] = "emergency thermal reset disabled";
 	u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;