mxs: add generic subtarget

Same game as for 853e4dd3062df7cb5704b15d6af6730e3194b571. Add generic
to the filenames.

Signed-off-by: Christian Marangi <[email protected]>

target/linux/mxs/Makefile

@@ -9,6 +9,7 @@ BOARD:=mxs
 BOARDNAME:=Freescale i.MX23/i.MX28
 FEATURES:=ext4 rtc usb gpio
 CPU_TYPE:=arm926ej-s
+SUBTARGETS:=generic
 
 KERNEL_PATCHVER:=5.10
 KERNEL_TESTING_PATCHVER:=5.15

target/linux/mxs/generic/target.mk

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