riscv: qemu: Enable e1000 and nvme support

Since we have added the PCI support to the 'virt' target, enable
e1000 and NVME as alternate network and storage devices for these
virtio based devices.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Tested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
diff --git a/board/emulation/qemu-riscv/Kconfig b/board/emulation/qemu-riscv/Kconfig
index 2a03e43..7f9a74d 100644
--- a/board/emulation/qemu-riscv/Kconfig
+++ b/board/emulation/qemu-riscv/Kconfig
@@ -40,5 +40,7 @@
 	imply DM_PCI
 	imply PCIE_ECAM_GENERIC
 	imply CMD_PCI
+	imply E1000
+	imply NVME
 
 endif