[BUG? -next] Compile tpm driver as module

[Jin Dongming]

When we compiled tpm driver as module in the next-tree, some errors happened.
The output error messages is showed as following:
    drivers/char/tpm/tpm.c:719: error: redefinition of ‘tpm_pcr_read’
    include/linux/tpm.h:35: note: previous definition of ‘tpm_pcr_read’ was here
    drivers/char/tpm/tpm.c:751: error: redefinition of ‘tpm_pcr_extend’
    include/linux/tpm.h:38: note: previous definition of ‘tpm_pcr_extend’ was here
    make[3]: *** [drivers/char/tpm/tpm.o] Error 1

The information of .config:
    CONFIG_TCG_TPM=m

Though I don't know the real reason, I found that the following patch caused
the problem.
    commit d6ba452128178091dab7a04d54f7e66fdc32fb39
    title: tpm add default function definitions

Best regards,
Jin Dongming

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