ARM: OMAP1: Misc clean-up

Remove unnecessary Kconfig line and allow compile of MBOX_FWK.
Also allow building USB on Nokia 770.

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile
index 1bda8f5..6867cd3 100644
--- a/arch/arm/mach-omap1/Makefile
+++ b/arch/arm/mach-omap1/Makefile
@@ -13,6 +13,10 @@
 # Power Management
 obj-$(CONFIG_PM) += pm.o sleep.o
 
+# DSP
+obj-$(CONFIG_OMAP_MBOX_FWK)	+= mailbox_mach.o
+mailbox_mach-objs		:= mailbox.o
+
 led-y := leds.o
 
 # Specific board support