drm/ttm: remove nonsense AGP handling

map_page_into_agp() and unmap_page_from_agp() are only defined on x86.

On all other platforms they are defined as noops. So this code doesn't has any effect at all.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/391292/

include/drm/ttm/ttm_set_memory.h

@@ -71,48 +71,6 @@ static inline int ttm_set_pages_uc(struct page *page, int numpages)
 
 #else /* for CONFIG_X86 */
 
-#if IS_ENABLED(CONFIG_AGP)
-
-#include <asm/agp.h>
-
-static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
-{
-	int i;
-
-	for (i = 0; i < addrinarray; i++)
-		unmap_page_from_agp(pages[i]);
-	return 0;
-}
-
-static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
-{
-	int i;
-
-	for (i = 0; i < addrinarray; i++)
-		map_page_into_agp(pages[i]);
-	return 0;
-}
-
-static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
-{
-	int i;
-
-	for (i = 0; i < addrinarray; i++)
-		map_page_into_agp(pages[i]);
-	return 0;
-}
-
-static inline int ttm_set_pages_wb(struct page *page, int numpages)
-{
-	int i;
-
-	for (i = 0; i < numpages; i++)
-		unmap_page_from_agp(page++);
-	return 0;
-}
-
-#else /* for CONFIG_AGP */
-
 static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
 {
 	return 0;
@@ -133,8 +91,6 @@ static inline int ttm_set_pages_wb(struct page *page, int numpages)
 	return 0;
 }
 
-#endif /* for CONFIG_AGP */
-
 static inline int ttm_set_pages_wc(struct page *page, int numpages)
 {
 	return 0;