riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild

Commit 909548d6c5 ("riscv: add arch/riscv/Kbuild") intended that
subdirectories in arch/riscv/ would be added in arch/riscv/Kbuild.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/Kbuild

@@ -2,6 +2,8 @@
 
 obj-y += kernel/ mm/ net/
 obj-$(CONFIG_BUILTIN_DTB) += boot/dts/
+obj-y += errata/
+obj-$(CONFIG_KVM) += kvm/
 
 obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += purgatory/
 

arch/riscv/Makefile

@@ -103,9 +103,6 @@ endif
 
 head-y := arch/riscv/kernel/head.o
 
-core-y += arch/riscv/errata/
-core-$(CONFIG_KVM) += arch/riscv/kvm/
-
 libs-y += arch/riscv/lib/
 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a