lscpu: read_hypervisor_dmi: only fallback to memory scan on x86/x86_64

As the comment in the code says, this method is really only valid
on x86 and x86_64, so add a #ifdef for those architectures around
that code block.

This was causing "Program lscpu tried to access /dev/mem between f0000->100000."
warnings on some ppc64 machines.

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

sys-utils/lscpu-dmi.c

@@ -258,6 +258,7 @@ int read_hypervisor_dmi(void)
 	free(buf);
 
 memory_scan:
+#if defined(__x86_64__) || defined(__i386__)
 	/* Fallback to memory scan (x86, x86_64) */
 	buf = get_mem_chunk(0xF0000, 0x10000, _PATH_DEV_MEM);
 	if (!buf)
@@ -275,7 +276,7 @@ memory_scan:
 		if (rc >= 0)
 			break;
 	}
-
+#endif
 done:
 	free(buf);
 	return rc;