rpi-kernel: update to 4.9.58 (#8522)
rpi-kernel: update to 4.9.58 (#8522)

Replace mkknlimg with cp as it is deprecated and leads to broken
kernels:

    https://github.com/raspberrypi/linux/issues/2239
coredumb/void-packages,floGik/void-packages,coredumb/void-packages,EaterOfCode/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,EaterOfCode/void-packages,liwakura/void-packages,juliendehos/void-packages,NeoChontrix/void-packages,coredumb/void-packages,NeoChontrix/void-packages,floGik/void-packages,kulinacs/void-packages,juliendehos/void-packages,EaterOfCode/void-packages,NeoChontrix/void-packages,floGik/void-packages,kulinacs/void-packages,liwakura/void-packages,kulinacs/void-packages,juliendehos/void-packages,EaterOfCode/void-packages,floGik/void-packages,juliendehos/void-packages,liwakura/void-packages,coredumb/void-packages,kulinacs/void-packages,kulinacs/void-packages,coredumb/void-packages,kulinacs/void-packages,NeoChontrix/void-packages,liwakura/void-packages,floGik/void-packages,juliendehos/void-packages,liwakura/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,liwakura/void-packages,necrophcodr/void-packages,EaterOfCode/void-packages,coredumb/void-packages,necrophcodr/void-packages,juliendehos/void-packages,floGik/void-packages