media: radio-wl1273: Avoid card name truncation

The "card" string only holds 31 characters (and the terminating NUL).
In order to avoid truncation, use a shorter card description instead of
the current result, "Texas Instruments Wl1273 FM Rad".

Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: 87d1a50c ("[media] V4L2: WL1273 FM Radio: TI WL1273 FM radio driver")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>