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/r8a77990_ebisu_defconfig b/configs/r8a77990_ebisu_defconfig
index 13422a1..fba03a7 100644
--- a/configs/r8a77990_ebisu_defconfig
+++ b/configs/r8a77990_ebisu_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_COUNTER_FREQUENCY=16666666
 CONFIG_ARCH_CPU_INIT=y
 CONFIG_ARCH_RMOBILE=y
 CONFIG_SYS_TEXT_BASE=0x50000000