V4L/DVB (6851): xc2028: include int_freq in firmware version display

Add "int_freq" to the debugging output when selecting firmware and the
HAS_IF flag when dumping firmware during load.

Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>