udev-extraconf: introduce multiple blacklist files for more complex setups
In cases where a target image wants prevent the recovery partition is mounted
automatically, but the recovery partition identifier moves with the device
(internal flash, sd card, usb stick, ...), device/machine dependend extra
blacklists might be desired.
The grep utility prints the file name for each match when there is more
than one file to search. Add -h to suppress the prefixing of file names
on output.
Signed-off-by: Jens Rehsack <sno@netbsd.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
