microblaze: delay.h fix udelay and ndelay for 8 bit args

Based on:
"asm-generic: delay.h fix udelay and ndelay for 8 bit args"
(sha1: a87e553)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/include/asm/delay.h

@@ -61,13 +61,29 @@ extern inline void __udelay(unsigned int x)
 extern void __bad_udelay(void);		/* deliberately undefined */
 extern void __bad_ndelay(void);		/* deliberately undefined */
 
-#define udelay(n) (__builtin_constant_p(n) ? \
-	((n) > __MAX_UDELAY ? __bad_udelay() : __udelay((n) * (19 * HZ))) : \
-	__udelay((n) * (19 * HZ)))
+#define udelay(n)						\
+	({							\
+		if (__builtin_constant_p(n)) {			\
+			if ((n) / __MAX_UDELAY >= 1)		\
+				__bad_udelay();			\
+			else					\
+				__udelay((n) * (19 * HZ));	\
+		} else {					\
+			__udelay((n) * (19 * HZ));		\
+		}						\
+	})
 
-#define ndelay(n) (__builtin_constant_p(n) ? \
-	((n) > __MAX_NDELAY ? __bad_ndelay() : __udelay((n) * HZ)) : \
-	__udelay((n) * HZ))
+#define ndelay(n)						\
+	({							\
+		if (__builtin_constant_p(n)) {			\
+			if ((n) / __MAX_NDELAY >= 1)		\
+				__bad_ndelay();			\
+			else					\
+				__udelay((n) * HZ);		\
+		} else {					\
+			__udelay((n) * HZ);			\
+		}						\
+	})
 
 #define muldiv(a, b, c)		(((a)*(b))/(c))