kconfig: Add NVME to s390x machines

We recently had issues with nvme devices on big endian platforms.
Include their compilation on s390x to ease tests.

Signed-off-by: Cédric Le Goater <clg@redhat.com>
Message-ID: <20230828150148.120031-1-clg@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/nvme/Kconfig

 config NVME_PCI
     bool
-    default y if PCI_DEVICES
+    default y if PCI_DEVICES || PCIE_DEVICES
     depends on PCI