env: fat: Add support for NVME

Add support for retrieving the FAT environment from an NVME device, the
same way it can be retrieved from MMC, SCSI, or VIRTIO.

To use the FAT environment from an NVME device, pass
CONFIG_ENV_FAT_INTERFACE="nvme" in the defconfig.

Signed-off-by: Fabio Estevam <festevam@gmail.com>

env/fat.c

@@ -14,8 +14,10 @@
 #include <memalign.h>
 #include <search.h>
 #include <errno.h>
+#include <init.h>
 #include <fat.h>
 #include <mmc.h>
+#include <nvme.h>
 #include <scsi.h>
 #include <virtio.h>
 #include <asm/cache.h>
@@ -136,6 +138,14 @@ static int env_fat_load(void)
 	if (!strcmp(ifname, "virtio"))
 		virtio_init();
 #endif
+#if defined(CONFIG_NVME)
+	if (!strcmp(ifname, "nvme")) {
+		if (IS_ENABLED(CONFIG_PCI))
+			pci_init();
+
+		nvme_scan_namespace();
+	}
+#endif
 #endif
 	part = blk_get_device_part_str(ifname, dev_and_part,
 				       &dev_desc, &info, 1);