media: dvb_ca_en50221: State UNINITIALISED instead of INVALID

In case of a linkinit failure change to state UNINITIALISED to re-init
the CAM.

Original code change by Ralph Metzler, modified by Jasmin Jessich to match
Kernel code style.

Signed-off-by: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>