powerpc/configs: Incorporate generic kvm_guest.config into guest configs

Incorporate the generic kvm_guest.config into the powerpc guest configs,
ppc64[le]_guest_defconfig.

This brings in some useful options, in particular 9P support, and also
means future additions to the generic file will be automatically picked
up by the powerpc configs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-30-mpe@ellerman.id.au

Author: mpe

arch/powerpc/Makefile

@@ -258,11 +258,11 @@ ppc64le_defconfig:
 
 generated_configs += ppc64le_guest_defconfig
 ppc64le_guest_defconfig:
-	$(call merge_into_defconfig,ppc64_defconfig,le guest)
+	$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
 
 generated_configs += ppc64_guest_defconfig
 ppc64_guest_defconfig:
-	$(call merge_into_defconfig,ppc64_defconfig,be guest)
+	$(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
 
 generated_configs += powernv_be_defconfig
 powernv_be_defconfig:

arch/powerpc/configs/kvm_guest.config

@@ -0,0 +1 @@
+../../../kernel/configs/kvm_guest.config