dm: video: test: Add tests for rotated consoles

Test that text is displayed correctly when the console is rotated.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 898c5f4..09ced01 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -77,6 +77,7 @@
 CONFIG_USB_KEYBOARD=y
 CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
+CONFIG_VIDEO_ROTATION=y
 CONFIG_VIDEO_SANDBOX_SDL=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y