mtd: denali: support NAND_CMD_RNDOUT command

The function nand_flash_detect_ext_param_page() requires
NAND_CMD_RNDOUT command supported.  It is necessary to detect some
types of ONFi-compliant devices.  Without it, the error message
"unsupported command received 0x5" is shown.

Let's support this command on the Denali NAND controller driver.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Chin Liang See <clsee@altera.com>

drivers/mtd/nand/denali.c

@@ -1072,6 +1072,13 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col,
 		if (cmd == NAND_CMD_PARAM)
 			udelay(50);
 		break;
+	case NAND_CMD_RNDOUT:
+		addr = MODE_11 | BANK(denali->flash_bank);
+		index_addr(denali, addr | 0, cmd);
+		index_addr(denali, addr | 1, col & 0xFF);
+		index_addr(denali, addr | 1, col >> 8);
+		index_addr(denali, addr | 0, NAND_CMD_RNDOUTSTART);
+		break;
 	case NAND_CMD_READ0:
 	case NAND_CMD_SEQIN:
 		denali->page = page;