mpc85xx: add 6.1 testing kernel

Configure 6.1 testing kernel for mpc85xx target.

Signed-off-by: Pawel Dembicki <[email protected]>

target/linux/mpc85xx/Makefile

@@ -12,6 +12,7 @@ FEATURES:=squashfs ramdisk nand
 SUBTARGETS:=p1010 p1020 p2020
 
 KERNEL_PATCHVER:=5.15
+KERNEL_TESTING_PATCHVER:=6.1
 
 KERNELNAME:=zImage