Fix spelling of "supported/unsupported".

Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index baa85ec..eb3a916 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -1135,7 +1135,7 @@
 		   loff_t maxsize, loff_t *actwrite)
 {
 	if (offset != 0) {
-		printf("Error: non zero offset is currently not suported.\n");
+		printf("Error: non zero offset is currently not supported.\n");
 		return -1;
 	}