drm: omapdrm: Rename GEM DMA sync functions

The omap_gem_cpu_sync() function operates at a page level, while the
omap_gem_dma_sync() function operates at a buffer level. Rename them to
omap_gem_cpu_sync_page() and omap_gem_dma_sync_buffer() respectively to
avoid confusion.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index 2e8d771..ee615fa 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -262,7 +262,7 @@ int omap_framebuffer_pin(struct drm_framebuffer *fb)
 		ret = omap_gem_pin(plane->bo, &plane->dma_addr);
 		if (ret)
 			goto fail;
-		omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
+		omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE);
 	}
 
 	omap_fb->pin_count++;