bcm53xx: add generic subtarget

Same game as for 853e4dd3. Add generic
to the filenames.

CC: Hauke Mehrtens <hauke@hauke-m.de>

Signed-off-by: Paul Spooren <mail@aparcar.org>
Acked-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/bcm53xx/Makefile

@@ -12,6 +12,7 @@ BOARDNAME:=Broadcom BCM47xx/53xx (ARM)
 FEATURES:=squashfs nand usb pci pcie gpio
 MAINTAINER:=Hauke Mehrtens <hauke@hauke-m.de>
 CPU_TYPE:=cortex-a9
+SUBTARGETS:=generic
 
 KERNEL_PATCHVER:=4.14
 KERNEL_TESTING_PATCHVER := 4.19

target/linux/bcm53xx/generic/target.mk

+BOARDNAME:=Generic