soc/tegra: pmc: Remove non-existing L2 partition for Tegra124

Tegra124 does not have an L2 power partition and the L2 cache is part of
the cluster 0 non-CPU (CONC) partition. Remove the L2 as a valid
partition for Tegra124. The TRM also shows that there is no L2 partition
for Tegra124.
Signed-off-by: NJon Hunter <jonathanh@nvidia.com>
Reviewed-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NThierry Reding <treding@nvidia.com>

drivers/soc/tegra/pmc.c

@@ -967,7 +967,6 @@ static const char * const tegra124_powergates[] = {
 	[TEGRA_POWERGATE_VENC] = "venc",
 	[TEGRA_POWERGATE_PCIE] = "pcie",
 	[TEGRA_POWERGATE_VDEC] = "vdec",
-	[TEGRA_POWERGATE_L2] = "l2",
 	[TEGRA_POWERGATE_MPE] = "mpe",
 	[TEGRA_POWERGATE_HEG] = "heg",
 	[TEGRA_POWERGATE_SATA] = "sata",