bcm53xx: switch to Kernel 5.15 by default

Getting ready for the next release.

Signed-off-by: Paul Spooren <[email protected]>
Tested-by: Rafał Miłecki <[email protected]>

target/linux/bcm53xx/Makefile

@@ -11,8 +11,7 @@ FEATURES:=squashfs nand usb pci pcie gpio pwm
 CPU_TYPE:=cortex-a9
 SUBTARGETS:=generic
 
-KERNEL_PATCHVER:=5.10
-KERNEL_TESTING_PATCHVER:=5.15
+KERNEL_PATCHVER:=5.15
 
 define Target/Description
 	Build firmware images for Broadcom based BCM47xx/53xx routers with ARM CPU, *not* MIPS.