scripts: ath10k-check: filter warnings not coming from ath directory
scripts: ath10k-check: filter warnings not coming from ath directory

By default the script now does not show any warnings outside ath directory, but
with --no-filter that can be disabled:

$ ath10k-check
$ ath10k-check --no-filter
./arch/x86/include/asm/uaccess.h:714:18: warning: incorrect type in argument 1 (different modifiers)
./arch/x86/include/asm/uaccess.h:714:18:    expected void *<noident>
./arch/x86/include/asm/uaccess.h:714:18:    got void const *from
./include/linux/relay.h:209:16: warning: incorrect type in initializer (different address spaces)
./include/linux/relay.h:209:16:    expected void const [noderef] <asn:3>*__vpp_verify
./include/linux/relay.h:209:16:    got struct rchan_buf **<noident>
$

Signed-off-by: Kalle Valo <7081a7d99b8c74c0698a728df19e3915a995d7e1@qca.qualcomm.com>

qca/qca-swiss-army-knife,qca/qca-swiss-army-knife,qca/qca-swiss-army-knife,qca/qca-swiss-army-knife