Bug in memset() call in nvidia_subr.c's nvidia_get_card_info()

Recent commits to the FreeBSD kernel (r334533 and r334534, which modified sys/libkern/memset.c) had apparently revealed a bug in the nVidia driver code (nvidia_get_card_info() function of nvidia_subr.c file). The following pseudo-patch fixes it:

struct nv_ioctl_card_info *ci;
-    memset(ci, 0, sizeof(ci));
+    memset(ci, 0, sizeof(*ci));

See the following PR (aka bug report aka issue) for the details. I hope you guys could fix it in the next release(s). Thanks!