r251736: amd64/vmm/io/vlapic.c:468:15: error:implicit declaration of function 'cpusetobj_ffs' is invalid in C99

[O. Hartmann]

Kernel compilation fails on most recent CURRENT with the following
error on AMD64 machines:

--- vlapic.o ---
/usr/src/sys/modules/vmm/../../amd64/vmm/io/vlapic.c:468:15: error:
implicit declaration of function 'cpusetobj_ffs' is invalid in C99
[-Werror,-Wimplicit-function-declaration] while ((i =
cpusetobj_ffs(&dmask)) != 0) { ^ 1 error generated.
*** [vlapic.o] Error code 1

make: stopped in /usr/src/sys/modules/vmm