Blackfin: fix incomplete renaming of the bfin-twi-lcd driver

The sed used to rename the bfin-twi-lcd only replaced the first instance
rather than all which led to the resources not being enabled when the
driver was built as a module.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>