Hook EST up to the build.

sys/conf/files.i386

@@ -218,6 +218,7 @@ i386/bios/smapi.c		optional smapi
 i386/bios/smapi_bios.S		optional smapi
 i386/bios/smbios.c		optional smbios
 i386/bios/vpd.c			optional vpd
+i386/cpufreq/est.c		optional cpufreq
 #i386/i386/apic_vector.s		optional apic
 i386/i386/atomic.c		standard				\
 	compile-with	"${CC} -c ${CFLAGS} ${DEFINED_PROF:S/^$/-fomit-frame-pointer/} ${.IMPSRC}"

sys/modules/cpufreq/Makefile

@@ -1,10 +1,15 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../dev/cpufreq
+.PATH:	${.CURDIR}/../../dev/cpufreq		\
+	${.CURDIR}/../../${MACHINE_ARCH}/cpufreq
 
 KMOD=	cpufreq
 WARNS?=	2
 SRCS=	ichss.c
 SRCS+=	bus_if.h cpufreq_if.h device_if.h pci_if.h
 
+.if ${MACHINE} == "i386"
+SRCS+=	est.c
+.endif
+
 .include <bsd.kmod.mk>