i386/84010: Buildkernel is broken with 'options CPU_DISABLE_SSE' in kernel conf file

[Sergey Gluschenko]

According to this patch: 
	http://freebsd.rambler.ru/bsdmail/freebsd-arch_2005/msg00626.html
we need to clean up all CPU_ENABLE_SSE in kernel, as Ruslan said:
	http://freebsd.rambler.ru/bsdmail/freebsd-arch_2005/msg00627.html
But we need working "options CPU_DISABLE_SSE", so I decided to replace
all "#ifdef CPU_ENABLE_SSE" to "#ifndef CPU_DISABLE_SSE" and
all "#if defined(CPU_ENABLE_SSE)" to "#if !defined(CPU_DISABLE_SSE)"

Also, #include "opt_cpu.h" was missing in sys/i386/i386/ptrace_machdep.c

After all this changes the reported problem is gone.

Here the patches:
	http://xlab.users.sevsky.net/freebsd/sys_i386_i386_initcpu.c.diff
	http://xlab.users.sevsky.net/freebsd/sys_i386_i386_machdep.c.diff
	http://xlab.users.sevsky.net/freebsd/sys_i386_i386_pmap.c.diff
	http://xlab.users.sevsky.net/freebsd/sys_i386_i386_ptrace_machdep.c.diff
	http://xlab.users.sevsky.net/freebsd/sys_i386_isa_npx.c.diff
	http://xlab.users.sevsky.net/freebsd/sys_i386_linux_linux_ptrace.c.diff (not tested!)
	http://xlab.users.sevsky.net/freebsd/sys_pc98_pc98_machdep.c.diff (not tested!)


--
Sergey Gluschenko