The hidden symbol SPL_SYS_NAND_SELF_INIT was not being used correctly
leading to Kconfig dependency issues seen with "make allyesconfig". As
it's a select'd symbol we don't need to have a depends line on it, and
then in turn we need to also update the logic on SYS_NAND_PAGE_SIZE and
SYS_NAND_OOBSIZE.
Signed-off-by: Tom Rini <trini@konsulko.com>
75153d92a5