[media] b2c2: Reset no_base_addr on skystarS2 attach failure

[media] b2c2: Reset no_base_addr on skystarS2 attach failure

If set, all the other drivers reset no_base_addr on failure to
attach - git commit for this being added to some of them seems to
be 797806908814846c07973950dc328045061d805f

This driver has been floating around outside the mainline for so
long it hasn't had this fix, so add it in.

Whilst here tidy surrounding code to fix style issues.

Signed-off-by: Jemma Denson <jdenson@gmail.com>
Signed-off-by: Patrick Boettcher <patrick.boettcher@posteo.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>