scripts: bareboxcrc32: remove usage of loff_t ...

loff_t is Linux-specific and unneeded at this place, as it's directly
passed into a parameter that's a ulong anyway. Thus use a ulong.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: bareboxcrc32 as host and target userspacetool ...

This patch adds the crc32 command to be build
as host and optionally as target tool.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>