drivers/misc/ti-st: Load firmware from ti-connectivity directory.

Looks like the default location for TI firmware is inside the ti-connectivity
directory, to be coherent with other firmware request used by TI drivers, load
the TIInit firmware from this directory instead of /lib/firmware directly.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>