disp: remove kernel mapping of writeback framebuffer

This change removes the fb_kmap debugfs node along with kernel
mapping of writeback framebuffer. It also replaces dma_buf_kmap
calls with dma_buf_vmap.

Change-Id: I2fbee7fa5922071f6805d8e6df540ce87056bc0b
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>

msm/sde/sde_connector.c

@@ -1368,9 +1368,6 @@ static int sde_connector_atomic_set_property(struct drm_connector *connector,
 		} else if (!c_state->out_fb && !val) {
 			SDE_DEBUG("cleared fb_id\n");
 			rc = 0;
-		} else {
-			msm_framebuffer_set_kmap(c_state->out_fb,
-					c_conn->fb_kmap);
 		}
 		break;
 	case CONNECTOR_PROP_RETIRE_FENCE:
@@ -1921,12 +1918,6 @@ static int sde_connector_init_debugfs(struct drm_connector *connector)
 				&sde_connector->esd_status_interval);
 	}
 
-	if (!debugfs_create_bool("fb_kmap", 0600, connector->debugfs_entry,
-			&sde_connector->fb_kmap)) {
-		SDE_ERROR("failed to create connector fb_kmap\n");
-		return -ENOMEM;
-	}
-
 	if (sde_connector->ops.cmd_transfer) {
 		if (!debugfs_create_file("tx_cmd", 0600,
 			connector->debugfs_entry,