microvm: Don't open-code "etc/table-loader"

Let's just reuse ACPI_BUILD_LOADER_FILE.

Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210304105554.121674-3-david@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/i386/acpi-microvm.c

@@ -255,7 +255,7 @@ void acpi_setup_microvm(MicrovmMachineState *mms)
                       ACPI_BUILD_TABLE_MAX_SIZE);
     acpi_add_rom_blob(acpi_build_no_update, NULL,
                       tables.linker->cmd_blob,
-                      "etc/table-loader", ACPI_BUILD_LOADER_MAX_SIZE);
+                      ACPI_BUILD_LOADER_FILE, ACPI_BUILD_LOADER_MAX_SIZE);
     acpi_add_rom_blob(acpi_build_no_update, NULL,
                       tables.rsdp,
                       ACPI_BUILD_RSDP_FILE, 0);