ath10k: Skip reading of utf.bin file

The non-bmi targets do need to load firmware from the
driver and is loaded by other procedure.

Since, utf.bin file is not needed, this change skips parsing
and loading of the same.

Change-Id: Id7cc0b1cd75f813c1b6c762685d8806a30ba8295
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>