cdx: Fix missing GENERIC_MSI_IRQ on compile test

cdx: Fix missing GENERIC_MSI_IRQ on compile test

CDX_BUS driver uses msi_setup_device_data() which is selected by
GENERIC_MSI_IRQ, thus compile testing without the latter failed:

  /usr/bin/ld: drivers/cdx/cdx.o: in function `cdx_probe':
  build/drivers/cdx/cdx.c:314: undefined reference to `msi_setup_device_data'

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Closes: https://lore.kernel.org/all/b2c54a12-480c-448a-8b90-333cb03d9c14@infradead.org/
Fixes: 7f81907b7e3f ("cdx: Enable compile testing")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250716064903.52397-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>