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 <[e-mail]>
Closes: https://lore.kernel.org/all/[e-mail]/
Fixes: 7f81907b7e3f ("cdx: Enable compile testing")
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/cdx/Kconfig

···
 config CDX_BUS
 	bool "CDX Bus driver"
 	depends on OF && ARM64 || COMPILE_TEST
+	select GENERIC_MSI_IRQ
 	help
 	  Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus
 	  exposes Fabric devices which uses composable DMA IP to the