video: fbdev: wmt_ge_rops: Fix function not declared warnings

Include own header to fix "function not declared" warnings.

Signed-off-by: Sam Ravnborg <[e-mail]>
Acked-by: Thomas Zimmermann <[e-mail]>
Cc: Tony Prisk <[e-mail]>
Cc: [e-mail]
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/video/fbdev/wmt_ge_rops.c

···
 #include <linux/fb.h>
 #include <linux/platform_device.h>
 #include "core/fb_draw.h"
+#include "wmt_ge_rops.h"
 
 #define GE_COMMAND_OFF		0x00
 #define GE_DEPTH_OFF		0x04