memory: tegra: Add SWGROUP names

Subsequent patches will add debugfs files that print the status of the
SWGROUPs. Add a new names field and complement the SoC tables with the
names of the individual SWGROUPs.

Signed-off-by: Thierry Reding <treding@nvidia.com>

include/soc/tegra/mc.h

@@ -40,6 +40,7 @@ struct tegra_mc_client {
 };
 
 struct tegra_smmu_swgroup {
+	const char *name;
 	unsigned int swgroup;
 	unsigned int reg;
 };