drm/qxl: fix build warnings on 32-bit

Just the usual printk related warnings.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index 6db7370..a4b71b2 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -151,7 +151,7 @@
 		struct qxl_bo *cmd_bo;
 		int release_type;
 		struct drm_qxl_command *commands =
-			(struct drm_qxl_command *)execbuffer->commands;
+			(struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 
 		if (DRM_COPY_FROM_USER(&user_cmd, &commands[cmd_num],
 				       sizeof(user_cmd)))
@@ -193,7 +193,7 @@
 
 		for (i = 0 ; i < user_cmd.relocs_num; ++i) {
 			if (DRM_COPY_FROM_USER(&reloc,
-					       &((struct drm_qxl_reloc *)user_cmd.relocs)[i],
+					       &((struct drm_qxl_reloc *)(uintptr_t)user_cmd.relocs)[i],
 					       sizeof(reloc))) {
 				qxl_bo_list_unreserve(&reloc_list, true);
 				qxl_release_unreserve(qdev, release);