tegra: switch to kernel 5.10

This target has testing support for kernel 5.10 for four months now.
Time to switch the default.

Signed-off-by: Adrian Schmutzler <[email protected]>
Acked-by: Tomasz Maciej Nowak <[email protected]>

target/linux/tegra/Makefile

@@ -11,8 +11,7 @@ FEATURES := audio boot-part display ext4 fpu gpio pci pcie rootfs-part rtc squas
 CPU_TYPE := cortex-a9
 CPU_SUBTYPE := vfpv3-d16
 
-KERNEL_PATCHVER := 5.4
-KERNEL_TESTING_PATCHVER := 5.10
+KERNEL_PATCHVER := 5.10
 
 include $(INCLUDE_DIR)/target.mk