sdmmc: implement driver suitable for fs + bootloader

* sdmmc: begin skeletoning sdmmc driver

* sdmmc: add most of SdHostStandardController

* sdmmc: implement most of SdmmcController

* sdmmc: Sdmmc2Controller

* sdmmc: skeleton implementation of Sdmmc1Controller

* sdmmc: complete abstract logic for Sdmmc1 power controller

* sdmmc: implement gpio handling for sdmmc1-register-control

* sdmmc: implement pinmux handling for sdmmc1-register-control

* sdmmc: fix building for arm32 and in stratosphere context

* sdmmc: implement voltage enable/set for sdmmc1-register-control

* util: move T(V)SNPrintf from kernel to util

* sdmmc: implement BaseDeviceAccessor

* sdmmc: implement MmcDeviceAccessor

* sdmmc: implement clock reset controller for register api

* sdmmc: fix bug in WaitWhileCommandInhibit, add mmc accessors

* exo: add sdmmc test program

* sdmmc: fix speed mode extension, add CheckMmcConnection for debug

* sdmmc: add DeviceDetector, gpio: implement client api

* gpio: modernize client api instead of doing it the lazy way

* sdmmc: SdCardDeviceAccessor impl

* sdmmc: update test program to read first two sectors of sd card

* sdmmc: fix vref sel

* sdmmc: finish outward-facing api (untested)

* ams: changes for libvapours including tegra register defs

* sdmmc: remove hwinit

stratosphere/boot2/source/boot2_main.cpp

@@ -75,7 +75,7 @@ void __appInit(void) {
         R_ABORT_UNLESS(pminfoInitialize());
         R_ABORT_UNLESS(pmshellInitialize());
         R_ABORT_UNLESS(setsysInitialize());
-        R_ABORT_UNLESS(gpioInitialize());
+        gpio::Initialize();
     });
 
     /* Mount the SD card. */
@@ -86,7 +86,7 @@ void __appInit(void) {
 
 void __appExit(void) {
     fs::Unmount("sdmc");
-    gpioExit();
+    gpio::Finalize();
     setsysExit();
     pmshellExit();
     pminfoExit();