[][kernel][common][add dhrystone default setting to kernel config]

[Description]
Add dhrystone default setting to kernel config.

[Release-log]
N/A

Change-Id: Ic65794d40d291b21d3cbc4a5a4bce2574cfdbdde
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7681565
4 files changed