Proper fix for 1fa30b7

Replace #define with typedef

Author: sg-

features/filesystem/bd/MBRBlockDevice.cpp

@@ -38,16 +38,16 @@ MBED_PACKED(struct) mbr_table {
 static inline uint32_t tole32(uint32_t a)
 {
     union {
-        uint32_t w;
-        uint8_t b[4];
-    } s;
+        uint32_t u32;
+        uint8_t u8[4];
+    } w;
 
-    s.b[0] = a >>  0;
-    s.b[1] = a >>  8;
-    s.b[2] = a >> 16;
-    s.b[3] = a >> 24;
+    w.u8[0] = a >>  0;
+    w.u8[1] = a >>  8;
+    w.u8[2] = a >> 16;
+    w.u8[3] = a >> 24;
 
-    return s.w;
+    return w.u32;
 }
 
 static inline uint32_t fromle32(uint32_t a)

targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/common/bsp/basic_types.h

@@ -63,14 +63,14 @@ typedef signed long long        __int64_t;
 typedef unsigned long long      __uint64_t;
 #endif
 
-#define s8                      int8_t
-#define u8                      uint8_t
-#define s16                     int16_t
-#define u16                     uint16_t
-#define s32                     int32_t
-#define u32                     uint32_t
-#define s64                     int64_t
-#define u64                     uint64_t
+typedef int8_t s8;
+typedef uint8_t u8;
+typedef int16_t s16;
+typedef uint16_t u16;
+typedef int32_t s32;
+typedef uint32_t u32;
+typedef int64_t s64;
+typedef uint64_t u64;
 
 #ifdef CONFIG_MBED_ENABLED
 #ifndef BOOL