staging: mt29f_spinand: remove pointer to pointer cast in function argument

Removes unnecessary pointer to pointer cast on function arguments.
It is worth noting that buf is already a u8 pointer.
Issue detected and resolved using the following coccinelle script:

@@
expression e;
type t;
identifier f;
@@

f(...,
-(t *)
e
,...)

Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt29f_spinand/mt29f_spinand.c

@@ -770,7 +770,7 @@ static void spinand_cmdfunc(struct mtd_info *mtd, unsigned int command,
 		break;
 	case NAND_CMD_READID:
 		state->buf_ptr = 0;
-		spinand_read_id(info->spi, (u8 *)state->buf);
+		spinand_read_id(info->spi, state->buf);
 		break;
 	case NAND_CMD_PARAM:
 		state->buf_ptr = 0;