kselftests/ir : Improve readability of modprobe error message

Improve the readability of error message which says module not found.
The new behaviour is consistent with the modprobe command.

Signed-off-by: Gautam Menghani <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/ir/ir_loopback.sh

···
 fi
 
 if ! /sbin/modprobe -q -n rc-loopback; then
-        echo "ir_loopback: module rc-loopback is not found [SKIP]"
+        echo "ir_loopback: module rc-loopback is not found in /lib/modules/`uname -r` [SKIP]"
         exit $ksft_skip
 fi