brcm2708: split up DEVICE_TITLE

Splits up DEVICE_TITLE into DEVICE_VENDOR, DEVICE_MODEL and DEVICE_VARIANT.

Fixes https://github.com/openwrt/openwrt/pull/2245

Signed-off-by: Moritz Warning <moritzwarning@web.de>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/brcm2708/image/Makefile

@@ -61,6 +61,7 @@ endef
 
 ### Devices ###
 define Device/Default
+  DEVICE_VENDOR := Raspberry Pi
   KERNEL := kernel-bin | kernel-img
   KERNEL_IMG := kernel.img
   IMAGES := factory.img.gz sysupgrade.img.gz
@@ -70,7 +71,7 @@ define Device/Default
 endef
 
 define Device/rpi
-  DEVICE_TITLE := Raspberry Pi B/B+/CM/Zero/ZeroW
+  DEVICE_MODEL := B/B+/CM/Zero/ZeroW
   DEVICE_DTS := bcm2708-rpi-b bcm2708-rpi-b-plus bcm2708-rpi-cm bcm2708-rpi-zero bcm2708-rpi-zero-w
   SUPPORTED_DEVICES := \
 	rpi-b rpi-b-plus rpi-cm rpi-zero rpi-zero-w \
@@ -87,7 +88,7 @@ ifeq ($(SUBTARGET),bcm2708)
 endif
 
 define Device/rpi-2
-  DEVICE_TITLE := Raspberry Pi 2B/3B/3B+/3CM/4B
+  DEVICE_MODEL := 2B/3B/3B+/3CM/4B
   DEVICE_DTS := bcm2709-rpi-2-b bcm2710-rpi-3-b bcm2710-rpi-3-b-plus bcm2711-rpi-4-b bcm2710-rpi-cm3
   SUPPORTED_DEVICES := \
 	rpi-2-b rpi-3-b rpi-3-b-plus rpi-cm \
@@ -109,8 +110,8 @@ ifeq ($(SUBTARGET),bcm2709)
 endif
 
 define Device/rpi-3
+  DEVICE_MODEL := 3B/3B+/3CM
   KERNEL_IMG := kernel8.img
-  DEVICE_TITLE := Raspberry Pi 3B/3B+/3CM
   DEVICE_DTS := broadcom/bcm2710-rpi-3-b broadcom/bcm2710-rpi-3-b-plus broadcom/bcm2710-rpi-cm3
   SUPPORTED_DEVICES := \
 	rpi-3-b rpi-3-b-plus \
@@ -128,6 +129,7 @@ ifeq ($(SUBTARGET),bcm2710)
 endif
 
 define Device/rpi-4
+  DEVICE_MODEL := 4B
   KERNEL_IMG := kernel8.img
   DEVICE_TITLE := Raspberry Pi 4B
   DEVICE_DTS := broadcom/bcm2711-rpi-4-b