drm/nouveau/gr/gf100-: Clean up some inconsistent indenting

Eliminate the follow smatch warning:

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c:1925
gf100_gr_oneinit_tiles() warn: inconsistent indenting.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220505081345.89762-1-jiapeng.chong@linux.alibaba.com