staging/easycap: more style fixing in easycap_main.c

mostly indentation fixes and some line over 80 characters fixes

Cc: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>