UBUNTU: [Packaging] temporarily disable riscv64 builds

Disable riscv64 build for now, since the ABI files are completely
removed every time we start a new kernel release.

Moreover, building riscv64 in generic consistently increase the overall
build time of the packages (3 days or more), slowing down the testing
process of the new published kernels.

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

debian.master/abi/riscv64/ignore

@@ -1 +0,0 @@
-1

debian.master/abi/riscv64/ignore.modules

@@ -1 +0,0 @@
-1

debian.master/abi/riscv64/ignore.retpoline

@@ -1 +0,0 @@
-1

debian.master/control.d/vars.generic

@@ -1,4 +1,4 @@
-arch="amd64 armhf arm64 ppc64el riscv64 s390x"
+arch="amd64 armhf arm64 ppc64el s390x"
 supported="Generic"
 target="Geared toward desktop and server systems."
 desc="=HUMAN= SMP"

debian.master/rules.d/riscv64.mk

@@ -1,18 +1,18 @@
-human_arch	= RISC-V
-build_arch	= riscv
-defconfig	= defconfig
-flavours	= generic
-build_image	= Image
-kernel_file	= arch/$(build_arch)/boot/Image
-install_file	= vmlinuz
+human_arch     = RISC-V
+build_arch     = riscv
+defconfig      = defconfig
+flavours       = generic
+build_image    = Image
+kernel_file    = arch/$(build_arch)/boot/Image
+install_file   = vmlinuz
 
-vdso		= vdso_install
-no_dumpfile	= true
+vdso           = vdso_install
+no_dumpfile    = true
 
-do_extras_package	= true
-do_tools_usbip		= true
-do_tools_cpupower	= true
-do_tools_perf		= true
-do_tools_perf_jvmti	= true
-do_tools_bpftool	= true
-do_dtbs			= true
+do_extras_package      = false
+do_tools_usbip         = false
+do_tools_cpupower      = false
+do_tools_perf          = false
+do_tools_perf_jvmti    = false
+do_tools_bpftool       = false
+do_dtbs                = false

debian/control.d/linux-libc-dev.stub

@@ -1,5 +1,5 @@
 Package: linux-libc-dev
-Architecture: amd64 armhf arm64 i386 ppc64el riscv64 s390x
+Architecture: amd64 armhf arm64 i386 ppc64el s390x
 Depends: ${misc:Depends}
 Conflicts: linux-kernel-headers
 Replaces: linux-kernel-headers