Tegra186: modify the return type for `plat_get_syscnt_freq()`

Commit c073fda1c692d7c74415d26fb483d6336330fcc0 upstream changed the
return type for `plat_get_syscnt_freq()` from uint64_t to unsigned
long long.

This patch modifies the return type for the Tegra186 platform.

Change-Id: Ic9e5c364b90972265576e271582a4347e5eaa6eb
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t186/plat_setup.c b/plat/nvidia/tegra/soc/t186/plat_setup.c
index 1dd0d6e..ac36a14 100644
--- a/plat/nvidia/tegra/soc/t186/plat_setup.c
+++ b/plat/nvidia/tegra/soc/t186/plat_setup.c
@@ -113,7 +113,7 @@
 /*******************************************************************************
  * Handler to get the System Counter Frequency
  ******************************************************************************/
-unsigned int plat_get_syscnt_freq2(void)
+unsigned long long plat_get_syscnt_freq(void)
 {
 	return 31250000;
 }