qualcommax: add 6.6 as testing kernel

Provide kernel 6.6 as the testing kernel for qualcommax.

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

target/linux/qualcommax/Makefile

@@ -9,6 +9,7 @@ CPU_TYPE:=cortex-a53
 SUBTARGETS:=ipq807x ipq60xx
 
 KERNEL_PATCHVER:=6.1
+KERNEL_TESTING_PATCHVER:=6.6
 
 include $(INCLUDE_DIR)/target.mk
 DEFAULT_PACKAGES += \