sifiveu: switch default to 6.6

Switch the default kernel to 6.6.

Signed-off-by: Zoltan HERPAI <[email protected]>

target/linux/sifiveu/Makefile

@@ -11,8 +11,7 @@ FEATURES:=ext4
 KERNELNAME:=Image dtbs
 SUBTARGETS:=generic
 
-KERNEL_PATCHVER:=6.1
-KERNEL_TESTING_PATCHVER:=6.6
+KERNEL_PATCHVER:=6.6
 
 include $(INCLUDE_DIR)/target.mk