mmc: use new hwpart API when CONFIG_BLK enabled

When CONFIG_BLK is enabled, the hwpart id is different with legacy
interface, update it to kame driver work with CONFIG_BLK.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

cmd/mmc.c

@@ -253,7 +253,11 @@ static int do_mmcrpmb(cmd_tbl_t *cmdtp, int flag,
 		return CMD_RET_FAILURE;
 	}
 	/* Switch to the RPMB partition */
+#ifndef CONFIG_BLK
 	original_part = mmc->block_dev.hwpart;
+#else
+	original_part = mmc_get_blk_desc(mmc)->hwpart;
+#endif
 	if (blk_select_hwpart_devnum(IF_TYPE_MMC, curr_device, MMC_PART_RPMB) !=
 	    0)
 		return CMD_RET_FAILURE;