Tegra194: timers: increase the step value to 5ms

The RTC consumes 250us for each register read/write. Increase the step
value to 5ms to cover all the register read/write in program_timer().

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: Iac0fc070dbf85a6352fbf147fc5945820e8ee495
diff --git a/plat/nvidia/tegra194/timers.c b/plat/nvidia/tegra194/timers.c
index 98bd63b..39080df 100644
--- a/plat/nvidia/tegra194/timers.c
+++ b/plat/nvidia/tegra194/timers.c
@@ -14,7 +14,7 @@
 #include <utils_def.h>
 
 /* timer granularity in ms */
-#define TEGRA194_RTC_STEP_VALUE_MS		U(2)
+#define TEGRA194_RTC_STEP_VALUE_MS		U(5)
 
 /* IRQ value for Tegra194 Timer0 */
 #define TEGRA194_RTC_IRQ			U(42)