Fix mbtk_gnssd setting.

Change-Id: I3fc4664ff357f869466ee5aaf1648658493c64c8
diff --git a/mbtk/mbtk_gnssd/gnss_6228.c b/mbtk/mbtk_gnssd/gnss_6228.c
index 2cd86a4..066ae36 100755
--- a/mbtk/mbtk_gnssd/gnss_6228.c
+++ b/mbtk/mbtk_gnssd/gnss_6228.c
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