zynq: add generic subtarget

Same game as for 853e4dd306. Add generic
to the filenames.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

target/linux/zynq/Makefile

@@ -10,6 +10,7 @@ BOARDNAME:=Xilinx Zynq 7000 SoCs
 FEATURES:=fpu gpio rtc usb usbgadget boot-part rootfs-part squashfs
 CPU_TYPE:=cortex-a9
 CPU_SUBTYPE:=neon
+SUBTARGETS:=generic
 
 # future support SUBTARGETS: for both zynq and zynqmp
 

target/linux/zynq/generic/target.mk

@@ -0,0 +1 @@
+BOARDNAME:=Generic