configs: set CONFIG_COUNTER_FREQUENCY

Set CONFIG_COUNTER_FREQUENCY according to COUNTER_FREQUENCY in
config header file.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
[trini: Re-run migration]
diff --git a/configs/socfpga_agilex_vab_defconfig b/configs/socfpga_agilex_vab_defconfig
index b7c4d06..d29b517 100644
--- a/configs/socfpga_agilex_vab_defconfig
+++ b/configs/socfpga_agilex_vab_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_COUNTER_FREQUENCY=400000000
 CONFIG_SPL_LDSCRIPT="arch/arm/mach-socfpga/u-boot-spl-soc64.lds"
 CONFIG_ARCH_SOCFPGA=y
 CONFIG_SYS_TEXT_BASE=0x200000