FAT: use toupper/tolower instead of recoding them

toupper/tolower function are already declared, so use them.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>

fs/fat/fat.c

@@ -33,6 +33,7 @@
 #include <part.h>
 #include <malloc.h>
 #include <linux/compiler.h>
+#include <linux/ctype.h>
 
 /*
  * Convert a string to lowercase.
@@ -40,7 +41,7 @@
 static void downcase(char *str)
 {
 	while (*str != '\0') {
-		TOLOWER(*str);
+		*str = tolower(*str);
 		str++;
 	}
 }

fs/fat/fat_write.c

@@ -28,6 +28,7 @@
 #include <fat.h>
 #include <asm/byteorder.h>
 #include <part.h>
+#include <linux/ctype.h>
 #include "fat.c"
 
 static void uppercase(char *str, int len)
@@ -35,7 +36,7 @@ static void uppercase(char *str, int len)
 	int i;
 
 	for (i = 0; i < len; i++) {
-		TOUPPER(*str);
+		*str = toupper(*str);
 		str++;
 	}
 }

include/fat.h

@@ -98,9 +98,6 @@
 #endif
 #endif
 
-#define TOLOWER(c)	if((c) >= 'A' && (c) <= 'Z'){(c)+=('a' - 'A');}
-#define TOUPPER(c)	if ((c) >= 'a' && (c) <= 'z') \
-				(c) -= ('a' - 'A');
 #define START(dent)	(FAT2CPU16((dent)->start) \
 			+ (mydata->fatsize != 32 ? 0 : \
 			  (FAT2CPU16((dent)->starthi) << 16)))