mips: fix API expectations that break builds

Add the approrpiate car* empty implementations as well as types
included within the rest of coreboot to start building correctly.

Change-Id: Ifaf10281f9a9e28f518f4694630cbffa3f8d187d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9150
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: Aaron Durbin <adurbin@google.com>

src/arch/mips/include/arch/early_variables.h

@@ -23,8 +23,9 @@
 #define CAR_GLOBAL
 #define CAR_MIGRATE(migrate_fn_)
 
-static inline void car_migrate_variables(void) {}
+static inline void *car_get_var_ptr(void *var) { return var; }
 #define car_get_var(var) (var)
+#define car_sync_var(var) (var)
 #define car_set_var(var, val) { (var) = (val); }
 
 #endif /* __MIPS_ARCH_EARLY_VARIABLES_H */

src/arch/mips/include/stdint.h

@@ -94,6 +94,11 @@ typedef int8_t s8;
 typedef int16_t s16;
 typedef int32_t s32;
 
+typedef uint8_t bool;
+#define true	1
+#define false	0
+
+
 #undef __HAVE_LONG_LONG__
 
 #endif /* __MIPS_STDINT_H */