MIPS: fix types u64 and __u64 to unsigned long long

Linux MIPS uses asm-generic/int-ll64.h in asm/types.h.
Thus u64 and __u64 are defined as unsigned long long. Port this
over to U-Boot.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/include/asm/types.h

@@ -27,18 +27,12 @@ typedef unsigned short __u16;
 typedef __signed__ int __s32;
 typedef unsigned int __u32;
 
-#if (_MIPS_SZLONG == 64)
-
-typedef __signed__ long __s64;
-typedef unsigned long __u64;
-
-#else
-
 #if defined(__GNUC__)
 __extension__ typedef __signed__ long long __s64;
 __extension__ typedef unsigned long long __u64;
-#endif
-
+#else
+typedef __signed__ long long __s64;
+typedef unsigned long long __u64;
 #endif
 
 #endif /* __ASSEMBLY__ */
@@ -61,19 +55,8 @@ typedef unsigned short u16;
 typedef __signed int s32;
 typedef unsigned int u32;
 
-#if (_MIPS_SZLONG == 64)
-
-typedef __signed__ long s64;
-typedef unsigned long u64;
-
-#else
-
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
 typedef __signed__ long long s64;
 typedef unsigned long long u64;
-#endif
-
-#endif
 
 #if (defined(CONFIG_HIGHMEM) && defined(CONFIG_64BIT_PHYS_ADDR)) \
     || defined(CONFIG_64BIT)