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

srcpkgs/rpi-kernel/template

@@ -1,10 +1,10 @@
 # Template file for 'rpi-kernel'
 #
-_githash="6f54be87ea3626536a446e14bdbad9cffd650e1a"
+_githash="8f34d03766cb1e4d29b3fd00cbc8e0e70e63e18a"
 _gitshort="${_githash:0:7}"
 
 pkgname=rpi-kernel
-version=4.9.56
+version=4.9.58
 revision=1
 wrksrc="linux-${_githash}"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
@@ -12,7 +12,7 @@ homepage="http://www.kernel.org"
 license="GPL-2"
 short_desc="The Linux kernel for Raspberry Pi (${version%.*} series [git ${_gitshort}])"
 distfiles="https://github.com/raspberrypi/linux/archive/${_githash}.tar.gz"
-checksum=4b408dfce16489c58147439602a69e059d36d507f908f7f91a7f4a4c6b0586dc
+checksum=8dcd0c22e53d0c31e756161d48b80fc2089d7c99cf1e5892d81ba6a7fc1fa388
 
 _kernver="${version}_${revision}"
 
@@ -81,10 +81,10 @@ do_install() {
 	# Generate kernel.img and install it to destdir.
 	case "$XBPS_TARGET_MACHINE" in
 	armv7l*)
-		scripts/mkknlimg --dtok arch/arm/boot/zImage ${DESTDIR}/boot/kernel7.img
+		cp arch/arm/boot/zImage ${DESTDIR}/boot/kernel7.img
 		;;
 	armv6l*)
-		scripts/mkknlimg --dtok arch/arm/boot/zImage ${DESTDIR}/boot/kernel.img
+		cp arch/arm/boot/zImage ${DESTDIR}/boot/kernel.img
 		;;
 	esac