Add module makefiles for Texas Instruments ARM SoCs.

The natural place to look for them based on how other SoCs are organized
would be sys/modules/ti, but that's already taken.  Drop a clue into
modules/ti/Makefile directing people to modules/arm_ti if they're looking
for ARM modules.

sys/modules/arm_ti/Makefile

@@ -0,0 +1,9 @@
+# $FreeBSD$
+# Build modules specific to Texas Instruments ARM SoCs.
+
+SUBDIR = \
+	../am335x_dmtpps \
+	am335x_ehrpwm \
+	ti_i2c \
+	
+.include <bsd.subdir.mk>

sys/modules/arm_ti/am335x_ehrpwm/Makefile

@@ -0,0 +1,16 @@
+# $FreeBSD$
+
+.PATH: ${SRCTOP}/sys/arm/ti/am335x
+
+KMOD=	am335x_ehrpwm
+SRCS=	am335x_ehrpwm.c
+
+# Generated files...
+SRCS+=	\
+	bus_if.h \
+	device_if.h \
+	ofw_bus_if.h \
+	pwmbus_if.h \
+
+.include <bsd.kmod.mk>
+

sys/modules/arm_ti/ti_i2c/Makefile

@@ -0,0 +1,14 @@
+# $FreeBSD$
+
+.PATH: ${SRCTOP}/sys/arm/ti
+
+KMOD=	ti_i2c
+SRCS=	ti_i2c.c
+
+SRCS+=	\
+	bus_if.h \
+	device_if.h \
+	iicbus_if.h \
+	ofw_bus_if.h \
+
+.include <bsd.kmod.mk>

sys/modules/ti/Makefile

@@ -1,4 +1,6 @@
 # $FreeBSD$
+# Module for Alteon Networks Tigon PCI gigabit ethernet driver for FreeBSD.
+# Modules for Texas Instruments ARM SoCs are located in sys/modules/arm_ti.
 
 .PATH: ${SRCTOP}/sys/dev/ti