Implement plat_get_syscnt_freq2 on platforms

Replaced plat_get_syscnt_freq by plat_get_syscnt_freq2 on all
upstream platforms.

Change-Id: I3248f3f65a16dc5e9720012a05c35b9e3ba6abbe
diff --git a/plat/xilinx/zynqmp/aarch64/zynqmp_common.c b/plat/xilinx/zynqmp/aarch64/zynqmp_common.c
index 6e5cee3..f89cdce 100644
--- a/plat/xilinx/zynqmp/aarch64/zynqmp_common.c
+++ b/plat/xilinx/zynqmp/aarch64/zynqmp_common.c
@@ -297,9 +297,9 @@
 	mmio_write_32(IOU_SCNTRS_CONTROL, IOU_SCNTRS_CONTROL_EN);
 }
 
-unsigned long long plat_get_syscnt_freq(void)
+unsigned int plat_get_syscnt_freq2(void)
 {
-	unsigned long long counter_base_frequency;
+	unsigned int counter_base_frequency;
 
 	/* FIXME: Read the frequency from Frequency modes table */
 	counter_base_frequency = zynqmp_get_system_timer_freq();