staging: ft1000: Remove unnecessary assignment.

dsp_img_info->version and requested_version have same type
so additional temporary variable creation could be omitted
because variables could be compares directly.

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>