media: fix semicolon.cocci warnings

drivers/media/common/videobuf/videobuf2-core.c:2525:34-35: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

Fixes: 03fbdb2f ("media: move videobuf2 to drivers/media/common")

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>