media: amphion: remove unused struct 'vpu_malone_frame_buffer'

'vpu_malone_frame_buffer' has been unused since the original
commit 145e936380ed ("media: amphion: implement malone decoder rpc
interface").

Remove it.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/platform/amphion/vpu_malone.c

···
 	u32 reserved;
 };
 
-struct vpu_malone_frame_buffer {
-	u32 addr;
-	u32 size;
-};
-
 struct vpu_malone_udata {
 	u32 base;
 	u32 total_size;