Build warnings when building qemu with 'disable-tcg' for ppc64-softmmu target
Description of problem:
Building recent upstream qemu (HEAD 2c8311241d) for 'ppc64-softmmu' target is failing due to following build warnings:

<snip>
 ../target/ppc/cpu_init.c:7018:13: error: 'ppc_restore_state_to_opc' defined but not used [-Werror=unused-function]
 7018 | static void ppc_restore_state_to_opc(CPUState *cs,
<snip>
Steps to reproduce:
1. $ git clone --recurse-submodules https://gitlab.com/qemu-project/qemu.git 
2. ./configure --target-list=ppc64-softmmu --disable-tcg && make
Additional information:
Patch for this issue has been posted and reviewed at https://lore.kernel.org/all/20221116131743.658708-1-vaibhav@linux.ibm.com/