spl: mmc: Support OP-TEE payloads in Falcon mode

In general, Falcon mode means we're booting a linux kernel directly.
With FIT images, however, an OP-TEE secure kernel can be booted before
linux. Thus, if the next stage is an IH_OS_TEE, this isn't necessarily
a problem.

Of course, a general solution would involve mmc_load_image_raw_os()
only loading the binary, and leaving the decision of suitability to
someone else. However, a rework of the boot flow is beyond the scope
of this patch. Accept IH_OS_TEE as a valid OS value.
Signed-off-by: NAlexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NPatrick Delaunay <patrick.delaunay@foss.st.com>

common/spl/spl_mmc.c

@@ -230,8 +230,8 @@ static int mmc_load_image_raw_os(struct spl_image_info *spl_image,
 	if (ret)
 		return ret;
 
-	if (spl_image->os != IH_OS_LINUX) {
-		puts("Expected Linux image is not found. Trying to start U-boot\n");
+	if (spl_image->os != IH_OS_LINUX && spl_image->os != IH_OS_TEE) {
+		puts("Expected image is not found. Trying to start U-boot\n");
 		return -ENOENT;
 	}