kernel build failure with bce

[Sean McNeil]

The following error occurs building -stable on amd64:

make -sj2 buildworld && make -sj2 buildkernel
...
===> bce (all)
/usr/src/sys/modules/bce/../../dev/bce/if_bce.c: In function
`bce_rx_intr':
/usr/src/sys/modules/bce/../../dev/bce/if_bce.c:4093: error: structure
has no member named `rxcycles'
/usr/src/sys/modules/bce/../../dev/bce/if_bce.c: In function
`bce_ioctl':
/usr/src/sys/modules/bce/../../dev/bce/if_bce.c:4897: error: label
`bce_ioctl_exit' used but not defined

I have nothing in my config file for device bce, so it would appear
someone didn't check for building as a module.

Cheers,
Sean