tests: acpi: move boot_sector_init() into x86 tests branch

boot_sector_init() won't be used by arm/virt board, so move it from
global scope to x86 branch that uses it.
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <1556808723-226478-8-git-send-email-imammedo@redhat.com>
Tested-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

tests/bios-tables-test.c

@@ -788,13 +788,14 @@ int main(int argc, char *argv[])
     const char *arch = qtest_get_arch();
     int ret;
 
-    ret = boot_sector_init(disk);
-    if(ret)
-        return ret;
-
     g_test_init(&argc, &argv, NULL);
 
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
+        ret = boot_sector_init(disk);
+        if (ret) {
+            return ret;
+        }
+
         qtest_add_func("acpi/piix4", test_acpi_piix4_tcg);
         qtest_add_func("acpi/piix4/bridge", test_acpi_piix4_tcg_bridge);
         qtest_add_func("acpi/q35", test_acpi_q35_tcg);