media: staging/intel-ipu3: css: Convert comma to semicolon

media: staging/intel-ipu3: css: Convert comma to semicolon

The return of function imgu_css_grid_end_calc is void.

To ensure code clarity and prevent potential errors, it's advisable
to employ the ';' as a statement separator, except when ',' are
intentionally used for specific purposes.

Signed-off-by: Shen Lichuan <shenlichuan@vivo.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>