Arrange SRCS= as 1 file per line, alphabetical, so it's easier to maintain.

Whitespace only, no functional changes.

sys/modules/i2c/iicbus/Makefile

@@ -1,8 +1,16 @@
 # $FreeBSD$
 
 .PATH:	${SRCTOP}/sys/dev/iicbus
-KMOD		= iicbus
-SRCS		= device_if.h bus_if.h iicbus_if.h iicbus_if.c \
-		  iiconf.h iiconf.c iicbus.h iicbus.c
+
+KMOD=	iicbus
+SRCS=	\
+	bus_if.h \
+	device_if.h \
+	iicbus.c \
+	iicbus.h \
+	iicbus_if.c \
+	iicbus_if.h \
+	iiconf.c \
+	iiconf.h \
 
 .include <bsd.kmod.mk>