Enable support for the MMC-SPI driver through the device tree

This allows accessing the sd card as a block device and mounting partitions.

patches/riscv-binutils-gdb.patch

@@ -0,0 +1,26 @@
+diff --git a/gdb/configure b/gdb/configure
+index 6a0664ab16..0d1dd0b2b6 100755
+--- a/gdb/configure
++++ b/gdb/configure
+@@ -10362,7 +10362,7 @@ fi
+    
+    
+    
+-try_guile_versions="guile-2.2 guile-2.0"
++try_guile_versions="guile-2.0"
+    have_libguile=no
+    case "${with_guile}" in
+    no)
+diff --git a/gdb/configure.ac b/gdb/configure.ac
+index 10d2d10b12..70a9292e53 100644
+--- a/gdb/configure.ac
++++ b/gdb/configure.ac
+@@ -1134,7 +1134,7 @@ AC_MSG_RESULT([$with_guile])
+    dnl We check guile with pkg-config.
+    AC_PATH_PROG(pkg_config_prog_path, pkg-config, missing)
+    
+-try_guile_versions="guile-2.2 guile-2.0"
++try_guile_versions="guile-2.0"
+    have_libguile=no
+    case "${with_guile}" in
+    no)

patches/sifive.freedom.unleashed.u500ml507devkit.U500ML507DevKitConfig.dts

@@ -107,6 +107,16 @@
 			reg = <0x64001000 0x1000>;
 			reg-names = "control";
 			clocks = <&sysclk 0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mmc@0 {
+				compatible = "mmc-spi-slot";
+				reg = <0x0>;
+				spi-max-frequency = <0x1312d00>;
+				voltage-ranges = <0xce4 0xce4>;
+				disable-wp;
+			};
 		};
 		L9: serial@64003000 {
 			compatible = "klemens,terminal0";