kernel: mtk-bmt: fix usage of _oob_read
_oob_read returns number of bitflips on success while
bbt_nand_read should return 0.
Fixes: 2d49e49b18 ("mediatek: bmt: use generic mtd api")
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
			
			
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		@@ -95,8 +95,14 @@ bbt_nand_read(u32 page, unsigned char *dat, int dat_len,
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		.datbuf = dat,
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							.datbuf = dat,
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		.len = dat_len,
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							.len = dat_len,
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	};
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						};
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						int ret;
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	return bmtd._read_oob(bmtd.mtd, page << bmtd.pg_shift, &ops);
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						ret = bmtd._read_oob(bmtd.mtd, page << bmtd.pg_shift, &ops);
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						if (ret < 0)
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							return ret;
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						if (ret)
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							pr_info("%s: %d bitflips\n", __func__, ret);
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						return 0;
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}
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					}
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static inline int bbt_nand_erase(u16 block)
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					static inline int bbt_nand_erase(u16 block)
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