drm: debugfs: Silence warning from cast

Casting a pointer to an integer of a different size generates a warning
from the compiler. First cast the pointer to a pointer-sized type to
keep the compiler happy.

Fixes: 4f66fee ("drm: debugfs: provide infrastructure to dump a DRM GPU VA space")
Reviewed-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/010b58cd-1225-02f7-33f0-c678e5cd349d@arm.com

Author: stevenprice-arm

drivers/gpu/drm/drm_debugfs.c

@@ -209,7 +209,7 @@ int drm_debugfs_gpuva_info(struct seq_file *m,
 
 		seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
 			   va->va.addr, va->va.range, va->va.addr + va->va.range,
-			   (u64)va->gem.obj, va->gem.offset);
+			   (u64)(uintptr_t)va->gem.obj, va->gem.offset);
 	}
 
 	return 0;