[media] media: davinci_vpfe: dm365_resizer: fix sparse warning

this patch fixes following sparse warning,
dm365_resizer.c:223:1: warning: symbol 'resizer_calculate_resize_ratios' was not declared. Should it be static?
dm365_resizer.c:313:5: warning: symbol 'resizer_configure_output_win' was not declared. Should it be static?

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>