bcm53xx: build a single device per profile

So far every build of a single bcm53xx Target Profile (it means: when
NOT using CONFIG_TARGET_MULTI_PROFILE) resulted in all target devices
images being built. Now it only builds the one matching selected
profile.

Fixes: #13572

Suggested-by: Jonas Gorski <[email protected]>
Signed-off-by: Rani Hod <[email protected]>
[rmilecki: update commit subject + body & move PROFILES line]
Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm53xx/image/Makefile

@@ -143,6 +143,7 @@ USB2_PACKAGES += kmod-usb-ledtrig-usbport
 USB3_PACKAGES := $(USB2_PACKAGES) kmod-usb3 kmod-phy-bcm-ns-usb3
 
 define Device/Default
+  PROFILES = Generic $$(DEVICE_NAME)
   # .dtb files are prefixed by SoC type, e.g. bcm4708- which is not included in device/image names
   # extract the full dtb name based on the device info
   DEVICE_DTS := $(patsubst %.dtb,%,$(notdir $(wildcard $(if $(IB),$(KDIR),$(DTS_DIR))/*-$(subst _,-,$(1)).dtb)))