mtd: Remove obsolete macros only used by the old nand_ecclayout struct

All uses of MTD_MAX_{OOBFREE,ECCPOS}_ENTRIES_LARGE have been removed as
commit ef5eeea6 ("mtd: nand: brcm: switch to mtd_ooblayout_ops") and
commit aab616e3 ("mtd: kill the nand_ecclayout struct") replaced
struct nand_ecclayout by the new mtd_ooblayout_ops interface. Remove
these two macros therefore.

Reported-by: Yi Yang <yiyang13@huawei.com>
Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210830083356.31702-1-gongruiqi1@huawei.com