configs: change the value of NLS_CODEPAGE_437 from m to y

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5JMOU


CVE: NA

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if the NLS_CODEPAGE_437.ko does not exist in the bootrom system, but the
vfat filesystem depends on the NLS_CODEPAGE_437 module, the /boot/efi fails
to be mounted.
Change the value of NLS_CODEPAGE_437 from m to y in arch/arm64/configs
/openeuler_defconfig and arch/x86/configs/openeuler_defconfig.

Signed-off-by: zhanchengbin <zhanchengbin1@huawei.com>