archs38: default to kernel 6.1

Default to kernel 6.1 on archs38.

Signed-off-by: Robert Marko <[email protected]>

target/linux/archs38/Makefile

@@ -11,8 +11,7 @@ BOARDNAME:=Synopsys DesignWare ARC HS38
 FEATURES:=source-only
 SUBTARGETS:=generic
 
-KERNEL_PATCHVER:=5.15
-KERNEL_TESTING_PATCHVER:=6.1
+KERNEL_PATCHVER:=6.1
 
 DEVICE_TYPE:=basic