Make cpuctl_do_cpuid() and cpuctl_do_cpuid_count() return void.
There is no error to report.

Requested by:	attilio
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Put the aesni_cipher_setup() and aesni_cipher_process() functions into
the file which is compiled with SSE disabled.  The functions set up
the FPU context for kernel, and compiler optimizations which could
lead to use of XMM registers before the fpu_kern_enter(9) is called or
after fpu_kern_leave(9), panic the machine.

Discussed with:	jmg
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week