ipq40xx: move to kernel 6.1 by default

Move ipq40xx to kernel 6.1 by default.

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

target/linux/ipq40xx/Makefile

@@ -8,8 +8,7 @@ CPU_TYPE:=cortex-a7
 CPU_SUBTYPE:=neon-vfpv4
 SUBTARGETS:=generic chromium mikrotik
 
-KERNEL_PATCHVER:=5.15
-KERNEL_TESTING_PATCHVER:=6.1
+KERNEL_PATCHVER:=6.1
 
 KERNELNAME:=zImage Image dtbs