baytrail: Fix some minor errors in FSP

- Duplicate declaration of GetFspReservedMemoryFromGuid
- Corrupt line that was only compiled for a southbridge that no
  board in coreboot currently uses.

(thanks for Mike Hibbett <mhibbett@ircona.com> for pointing this out)

Change-Id: I847e807272acbaa93c87a89c0d2f94829c9121e6
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/5798
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>