flash: nand: prepare for aligning switch and case statements

To prepare for aligning switch and case statements, fix in advance
some checkpatch error due to existing code:
- remove useless parenthesis;
- don't end line with an open parenthesis;
- expand multiple assignments.

While there, put the 'default' case as last in the list.

Change-Id: I17bf5e88b145ef9b5b188424182f4e54b818eeae
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9011
Tested-by: jenkins

src/flash/nand/mx3.c

@@ -663,7 +663,7 @@ static int do_data_output(struct nand_device *nand)
 			/*
 			 * ECC stuff
 			 */
-			if ((mx3_nf_info->optype == MX3_NF_DATAOUT_PAGE)
+			if (mx3_nf_info->optype == MX3_NF_DATAOUT_PAGE
 					&& mx3_nf_info->flags.hw_ecc_enabled) {
 				uint16_t ecc_status;
 				target_read_u16 (target, MX3_NF_ECCSTATUS, &ecc_status);