apm821xx: make 5.15 kernel default

5.15 has been available for some time for testing.

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

target/linux/apm821xx/Makefile

@@ -9,8 +9,7 @@ CPU_TYPE:=464fp
 FEATURES:=fpu dt gpio ramdisk squashfs usb
 SUBTARGETS:=nand sata
 
-KERNEL_PATCHVER:=5.10
-KERNEL_TESTING_PATCHVER:=5.15
+KERNEL_PATCHVER:=5.15
 
 define Target/Description
 	Build images for AppliedMicro APM821xx based boards.