Revert "libdvbv5: leaks and double free in dvb_fe_open_fname()"

This reverts commit c82608ca.

This patch is buggy, as reported at:

	https://bugs.kde.org/show_bug.cgi?id=406145
	https://bugzilla.redhat.com/show_bug.cgi?id=1695023



So, revert it, in order to make Kaffeine work again.

Thanks to Wolfgang Ulbrich with detected the bad patch and
checked that reverting it fixes the issue.

Fix tested with a PCTV 461 and a DVB-S2 stream from my TV
provider.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>