PRODINFO: Revamp blanking/write disallow policy. (#913)

* exo/fusee: hookup new prodinfo settings

* fusee: new scheme doesn't need FLAGS_DEFAULT

* fusee: fix c/p errors

* ams.mitm: completely revamp prodinfo backup mechanism

* ams.mitm: Implement revamped blanking/write policy

* strat: make early boot more debuggable

* exo: condense flag logic

stratosphere/ams_mitm/source/set_mitm/settings_sd_kvs.cpp

@@ -328,10 +328,6 @@ namespace ams::settings::fwdbg {
             /* This is probably undesirable for normal usage. */
             R_ABORT_UNLESS(ParseSettingsItemValue("atmosphere", "enable_hbl_bis_write", "u8!0x0"));
 
-            /* Enable HBL to read the CAL0 partition. */
-            /* This is probably undesirable for normal usage. */
-            R_ABORT_UNLESS(ParseSettingsItemValue("atmosphere", "enable_hbl_cal_read", "u8!0x0"));
-
             /* Controls whether dmnt cheats should be toggled on or off by */
             /* default. 1 = toggled on by default, 0 = toggled off by default. */
             R_ABORT_UNLESS(ParseSettingsItemValue("atmosphere", "dmnt_cheats_enabled_by_default", "u8!0x1"));