arm64: don't trash config with compat symbol if COMPAT is disabled

ARCH_WANT_COMPAT_IPC_PARSE_VERSION is selected unconditionally. It
makes little sense if kernel is compiled without COMPAT support.
Fix it.

This patch makes no functional changes since all existing code which
is guarded with ARCH_WANT_COMPAT_IPC_PARSE_VERSION is also guarded
with COMPAT.
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

arch/arm64/Kconfig

@@ -65,7 +65,7 @@ config ARM64
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG
 	select ARCH_SUPPORTS_NUMA_BALANCING
-	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION if COMPAT
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_HAS_UBSAN_SANITIZE_ALL
 	select ARM_AMBA