memory: tegra186-emc: drop unused to_tegra186_emc()

to_tegra186_emc() is not used, W=1 builds:

  tegra186-emc.c:38:36: error: unused function 'to_tegra186_emc' [-Werror,-Wunused-function]

Fixes: 9a38cb27 ("memory: tegra: Add interconnect support for DRAM scaling in Tegra234")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240812123055.124123-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

drivers/memory/tegra/tegra186-emc.c

@@ -35,11 +35,6 @@ struct tegra186_emc {
 	struct icc_provider provider;
 };
 
-static inline struct tegra186_emc *to_tegra186_emc(struct icc_provider *provider)
-{
-	return container_of(provider, struct tegra186_emc, provider);
-}
-
 /*
  * debugfs interface
  *