imx8m: vpu: Fix the wrong positions of #endif in hantroenc_ioctl32()

The commit e0585ce2 ("MA-20005-12 hantro_vc8000e: Fix build error
exposed by -Wunused-variable") was supposed to wrapper the
hantroenc_ioctl32() with #ifdef and #endif. But it improperly put
the #endif in the middle of hantroenc_ioctl32(), and then cause weird
build errors. Fix them by moving the #endif out of the
hantroenc_ioctl32().

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>