soc/nvidia/tegra210/sor.c: Remove unuseful 'return' in void function

Change-Id: Ifaaf8a240436758a83216037994493255935f158
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61489
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/nvidia/tegra210/sor.c

@@ -579,8 +579,6 @@ static void dump_sor_reg(struct tegra_dc_sor_data *sor)
 	DUMP_REG(NV_SOR_DP_SPARE(0));
 	DUMP_REG(NV_SOR_DP_SPARE(1));
 	DUMP_REG(NV_SOR_DP_TPG);
-
-	return;
 }
 #endif