Tegra186: implement plat_get_syscnt_freq2()

Commit f3d3b316f82faa88e42f3d09c97cd9e52ac92599 replaced
plat_get_syscnt_freq by plat_get_syscnt_freq2 on all the
upstream platforms. This patch modifies the Tegra186 code
which is not present usptream, yet.

Change-Id: Ieda6168050a7769680a3a94513637fed03463a2d
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 261eeb0..7b39e82 100644
--- a/plat/nvidia/tegra/soc/t186/plat_setup.c
+++ b/plat/nvidia/tegra/soc/t186/plat_setup.c
@@ -114,7 +114,7 @@
 /*******************************************************************************
  * Handler to get the System Counter Frequency
  ******************************************************************************/
-unsigned long long plat_get_syscnt_freq(void)
+unsigned int plat_get_syscnt_freq2(void)
 {
 	return 31250000;
 }