PCH_HSTS_CLEAR_PRE
status &= PCH_HSTS_CLEAR_PRE;
pchsmbus_write8(pch, PCH_R_BAR_HSTS, PCH_HSTS_CLEAR_PRE);
#define PCH_HSTS_CLEAR_POST (PCH_HSTS_CLEAR_PRE | PCH_HSTS_IN_USE)