drm/rockchip: cdn-dp-core: add MODULE_FIRMWARE macro

The CDP DP component of the rockchip GPU driver requires firmware
so define MODULE_FIRMWARE for rockchip/dptx.bin so the details
are available in the module info.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210506092951.515813-1-pbrobinson@gmail.com

drivers/gpu/drm/rockchip/cdn-dp-core.c

@@ -42,6 +42,7 @@
 #define CDN_FW_TIMEOUT_MS	(64 * 1000)
 #define CDN_DPCD_TIMEOUT_MS	5000
 #define CDN_DP_FIRMWARE		"rockchip/dptx.bin"
+MODULE_FIRMWARE(CDN_DP_FIRMWARE);
 
 struct cdn_dp_data {
 	u8 max_phy;