Dont use -q to grep we pipe to /dev/null anyway all we
care is the return status of grep
(From OE-Core rev: 9c575b5f37ee53eaf26bfdc468d4cbb661db703f)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>