imx: use kernel 6.6 by default

Switch to Linux kernel version 6.6.

Signed-off-by: Mieczyslaw Nalewaj <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16107
Signed-off-by: Robert Marko <[email protected]>

target/linux/imx/Makefile

@@ -9,8 +9,7 @@ BOARDNAME:=NXP i.MX
 FEATURES:=audio display fpu gpio pcie rtc usb usbgadget squashfs targz nand ubifs boot-part rootfs-part
 SUBTARGETS:=cortexa7 cortexa9 cortexa53
 
-KERNEL_PATCHVER:=6.1
-KERNEL_TESTING_PATCHVER:=6.6
+KERNEL_PATCHVER:=6.6
 
 include $(INCLUDE_DIR)/target.mk