LoongArch: defconfig: enable CONFIG_CACHEFILES

LoongArch inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7362E

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enable cachefiles module, used by cachefilesd service.
Signed-off-by: NHongchen Zhang <zhanghongchen@loongson.cn>
Change-Id: I2c7a60b51e5c3a656b0821d6be9e505f1f9e6768

arch/loongarch/configs/loongson3_defconfig

@@ -981,6 +981,7 @@ CONFIG_OVERLAY_FS_INDEX=y
 CONFIG_OVERLAY_FS_XINO_AUTO=y
 CONFIG_OVERLAY_FS_METACOPY=y
 CONFIG_FSCACHE=y
+CONFIG_CACHEFILES=m
 CONFIG_ISO9660_FS=y
 CONFIG_JOLIET=y
 CONFIG_ZISOFS=y