drm/panfrost: Add forward declaration and types header

This is to make LLVM syntactic analysers happy.

Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Link: https://lore.kernel.org/r/20251019145225.3621989-10-adrian.larumbe@collabora.com
Signed-off-by: Steven Price <steven.price@arm.com>

Author: larunbe

drivers/gpu/drm/panfrost/panfrost_mmu.h

@@ -4,6 +4,7 @@
 #ifndef __PANFROST_MMU_H__
 #define __PANFROST_MMU_H__
 
+struct panfrost_device;
 struct panfrost_gem_mapping;
 struct panfrost_file_priv;
 struct panfrost_mmu;