imx: make kernel 5.10 default version

Signed-off-by: Piotr Dymacz <[email protected]>

target/linux/imx/Makefile

@@ -10,8 +10,7 @@ BOARDNAME:=NXP i.MX
 FEATURES:=audio display fpu gpio pcie rtc usb usbgadget squashfs targz nand ubifs boot-part rootfs-part
 SUBTARGETS:=cortexa7 cortexa9
 
-KERNEL_PATCHVER:=5.4
-KERNEL_TESTING_PATCHVER:=5.10
+KERNEL_PATCHVER:=5.10
 
 include $(INCLUDE_DIR)/target.mk