icE1usb fw: Move handling of device-wide request in usb_dev.c

We have upcoming ones not related to the E1 interface, so really
it make more sense to not have those in usb_e1.c

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I686916bb2b2cb90e94ac9c595deab19f189fcd49
diff --git a/firmware/ice40-riscv/icE1usb/Makefile b/firmware/ice40-riscv/icE1usb/Makefile
index 0022bd9..1240a9f 100644
--- a/firmware/ice40-riscv/icE1usb/Makefile
+++ b/firmware/ice40-riscv/icE1usb/Makefile
@@ -50,6 +50,7 @@
 	ice1usb_proto.h \
 	misc.h \
 	usb_desc_ids.h \
+	usb_dev.h \
 	usb_e1.h \
 	usb_str_app.gen.h \
 	$(NULL)
@@ -59,6 +60,7 @@
 	fw_app.c \
 	misc.c \
 	usb_desc_app.c \
+	usb_dev.c \
 	usb_e1.c \
 	$(NULL)