bmips: use kernel 6.12 by default

Switch to Linux kernel version 6.12.

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:=6.6
-KERNEL_TESTING_PATCHVER:=6.12
+KERNEL_PATCHVER:=6.12
 
 define Target/Description
 	Build firmware images for BCM33xx cable modem chips,