[dts] [PATCH V1] tests/TestSuite_efd:fix wrong sed command

[Tu, Lijuan]

> Subject: [dts] [PATCH V1] tests/TestSuite_efd:fix wrong sed command
> 
> fix wrong sed command, it miss '/' dut to replace failed
> 
> Signed-off-by: lingwei <weix.ling at intel.com>

Applied