loongarch/configs: Fix unknown filesystem type gfs2

kylin inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7KYTH
CVE: NA

-----------------------------------------------------------

While mounting the filesystem named 'gfs2' with the command such as
"mount /dev/sda10 /mnt",
we get:
        "mount: /mnt: unknown filesystem type 'gfs2'"

Fix this by requiring "CONFIG_GFS2_FS=m" instead of
"# CONFIG_GFS2_FS is not set" in the loongson3_defconfig configuration file
After this commit, this issue is now resolved.
Tested on loongarch 3C5000.
Signed-off-by: Nmengfanhui <mengfanhui@kylinos.cn>

arch/loongarch/configs/loongson3_defconfig

@@ -809,6 +809,7 @@ CONFIG_NFSD_V4=y
 CONFIG_NFSD_BLOCKLAYOUT=y
 CONFIG_CIFS=m
 # CONFIG_CIFS_DEBUG is not set
+CONFIG_GFS2_FS=m
 CONFIG_9P_FS=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_CODEPAGE_936=y