Make simple_strtoul work with upper-case hex numbers.

Signed-off-by: Harald Welte <laforge@openmoko.org>

Index: u-boot/lib_generic/vsprintf.c
===================================================================
--- u-boot.orig/lib_generic/vsprintf.c
+++ u-boot/lib_generic/vsprintf.c
@@ -25,21 +25,22 @@ unsigned long simple_strtoul(const char 
 {
 	unsigned long result = 0,value;
 
-	if (*cp == '0') {
-		cp++;
-		if ((*cp == 'x') && isxdigit(cp[1])) {
-			base = 16;
-			cp++;
-		}
-		if (!base) {
-			base = 8;
-		}
-	}
 	if (!base) {
 		base = 10;
+		if (*cp == '0') {
+			base = 8;
+			cp++;
+			if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
+				cp++;
+				base = 16;
+			}
+		}
+	} else if (base == 16) {
+		if (cp[0] == '0' && toupper(cp[1]) == 'X')
+			cp += 2;
 	}
-	while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
-	    ? toupper(*cp) : *cp)-'A'+10) < base) {
+	while (isxdigit(*cp) &&
+	       (value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
 		result = result*base + value;
 		cp++;
 	}