tpm/tpm_i2c_infineon: Add small comment about return value of __i2c_transfer
tpm/tpm_i2c_infineon: Add small comment about return value of __i2c_transfer

Kent Yoder indicated that the code might be a bit clearer with a comment
here, so this patch adds a small explanation of the code.

Signed-off-by: Peter Huewe <014f16385c5a8ff1646b588a3d5169b595c0f10e@gmx.de>
Signed-off-by: Kent Yoder <a62f2225bf70bfaccbc7f1ef2a397836717377de@linux.vnet.ibm.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs