Tegra194: mce: declare nvg_roc_clean_cache_trbits()

This patch adds the nvg_roc_clean_cache_trbits() function prototype
to mce_private.h to fix compilation failures seen with the Tegra194
builds.

Change-Id: I313556f6799792fc0141afb5822cc157db80bc47
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h

@@ -54,6 +54,7 @@ int32_t nvg_is_sc7_allowed(void);
 int32_t nvg_online_core(uint32_t core);
 int32_t nvg_update_ccplex_gsc(uint32_t gsc_idx);
 int32_t nvg_enter_cstate(uint32_t state, uint32_t wake_time);
+int32_t nvg_roc_clean_cache_trbits(void);
 void nvg_enable_strict_checking_mode(void);
 void nvg_system_shutdown(void);
 void nvg_system_reboot(void);