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

exosphere/sdmmc_test/source/panic.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "panic.h"
+
+void _ZN3ams10sdmmc_test16ExceptionHandlerEv();
+
+__attribute__ ((noreturn)) void panic(uint32_t code) {
+    (void)code;
+    _ZN3ams10sdmmc_test16ExceptionHandlerEv();
+    while(1);
+}