Though openwrt uses config-4.4 as basic kernel config and uses kmods to enable certain drivers. https://github.com/CreatorDev/linux repo should have all the kernel changes so
0092-TPM-configure-support-for-the-TPM-and-add-to-device-.patch
should be added with appropriate prefix and if there are such pistachio_defconfig related changes then it needs to be synched up as well.
Though openwrt uses config-4.4 as basic kernel config and uses kmods to enable certain drivers. https://github.com/CreatorDev/linux repo should have all the kernel changes so 0092-TPM-configure-support-for-the-TPM-and-add-to-device-.patch should be added with appropriate prefix and if there are such pistachio_defconfig related changes then it needs to be synched up as well.