- Add ofw_bus_if.h to SRCS on sparc64 as envctrl.c and pcf_ebus.c depend

on it.
- Sync with sys/conf/files* and build pcf_isa.c only on i386 for now.
- Try to adhere to style.Makefile(5) (sorting, whitespace).

sys/modules/i2c/controllers/pcf/Makefile

@@ -1,17 +1,20 @@
 # $FreeBSD$
 
-.PATH:		${.CURDIR}/../../../../dev/pcf
-KMOD		= pcf
-SRCS		= device_if.h bus_if.h iicbus_if.h isa_if.h \
-		  pcf.c
+.PATH: ${.CURDIR}/../../../../dev/pcf
 
-.if ${MACHINE_ARCH} != "sparc64"
-SRCS		+= pcf_isa.c
+KMOD=	pcf
+SRCS=	${envctrl} pcf.c ${pcf_ebus} ${pcf_isa}
+SRCS+=	bus_if.h device_if.h iicbus_if.h ${isa_if} ${ofw_bus_if}
+
+.if ${MACHINE_ARCH} == "i386"
+isa_if=		isa_if.h
+pcf_isa=	pcf_isa.c
 .endif
 
 .if ${MACHINE_ARCH} == "sparc64"
-SRCS		+= envctrl.c
-SRCS		+= pcf_ebus.c
+envctrl=	envctrl.c
+ofw_bus_if=	ofw_bus_if.h
+pcf_ebus=	pcf_ebus.c
 .endif
 
 .include <bsd.kmod.mk>