sdmmc: fix speed mode extension, add CheckMmcConnection for debug

libraries/libvapours/include/vapours/sdmmc/sdmmc_mmc.hpp

@@ -38,5 +38,6 @@ namespace ams::sdmmc {
     Result GetMmcBootPartitionCapacity(u32 *out_num_sectors, Port port);
     Result GetMmcExtendedCsd(void *out_buffer, size_t buffer_size, Port port);
 
+    Result CheckMmcConnection(SpeedMode *out_speed_mode, BusWidth *out_bus_width, Port port);
 
 }

libraries/libvapours/source/sdmmc/impl/sdmmc_mmc_device_accessor.cpp

@@ -65,7 +65,7 @@ namespace ams::sdmmc::impl {
             return (ext_csd[163] & (1u << 1)) != 0;
         }
 
-        constexpr bool GetDeviceType(const u8 *ext_csd) {
+        constexpr u8 GetDeviceType(const u8 *ext_csd) {
             /* Get the DEVICE_TYPE register. */
             AMS_ABORT_UNLESS(ext_csd != nullptr);
             return ext_csd[196];

libraries/libvapours/source/sdmmc/sdmmc_mmc.cpp

@@ -66,4 +66,8 @@ namespace ams::sdmmc {
         return GetMmcDeviceAccessor(port)->GetMmcExtendedCsd(out_buffer, buffer_size);
     }
 
+    Result CheckMmcConnection(SpeedMode *out_speed_mode, BusWidth *out_bus_width, Port port) {
+        return GetMmcDeviceAccessor(port)->CheckConnection(out_speed_mode, out_bus_width);
+    }
+
 }