fix endian subarchs for sh arch

default endianness for sh on linux is little, and while conventions
vary, "eb" seems to be the most widely used suffix for big endian.

arch/sh/bits/endian.h

-#if __LITTLE_ENDIAN__
-#define __BYTE_ORDER __LITTLE_ENDIAN
-#else
+#if __BIG_ENDIAN__
 #define __BYTE_ORDER __BIG_ENDIAN
+#else
+#define __BYTE_ORDER __LITTLE_ENDIAN
 #endif

arch/sh/reloc.h

-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define ENDIAN_SUFFIX "l"
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define ENDIAN_SUFFIX "eb"
 #else
 #define ENDIAN_SUFFIX ""
 #endif

configure

@@ -421,8 +421,8 @@ fi
 test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
 && SUBARCH=${SUBARCH}el
 
-test "$ARCH" = "sh" && trycppif __LITTLE_ENDIAN__ "$t" \
-&& SUBARCH=${SUBARCH}el
+test "$ARCH" = "sh" && trycppif __BIG_ENDIAN__ "$t" \
+&& SUBARCH=${SUBARCH}eb
 
 test "$SUBARCH" \
 && printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH"