bmips: switch default kernel to 6.6

Update default kernel version to 6.6 for the bmips devices.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/bmips/Makefile

@@ -9,8 +9,7 @@ BOARDNAME:=Broadcom BMIPS
 SUBTARGETS:=bcm6318 bcm6328 bcm6358 bcm6362 bcm6368 bcm63268
 FEATURES:=gpio squashfs usb
 
-KERNEL_PATCHVER:=6.1
-KERNEL_TESTING_PATCHVER:=6.6
+KERNEL_PATCHVER:=6.6
 
 define Target/Description
 	Build firmware images for BCM33xx cable modem chips,