uml: use kernel 6.12 by default

This patch switches the UML target Linux kernel version to 6.12.

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

target/linux/uml/Makefile

@@ -14,8 +14,7 @@ BOARDNAME:=User Mode Linux
 FEATURES:=audio ext4 rootfs-part squashfs
 SUBTARGETS:=generic
 
-KERNEL_PATCHVER:=6.6
-KERNEL_TESTING_PATCHVER:=6.12
+KERNEL_PATCHVER:=6.12
 
 include $(INCLUDE_DIR)/target.mk