libultra cleanup (#215)

* cleanup libultra

* fixes

- use quotes instead of <> for includes
- add macros for zelda specific thread priorities
- fix Makefile
- properly format the remaining pfs structs

* fix button macros + add CHECK_BTN_ANY/CHECK_BTN_ALL

* remove ULTRA_ABS

* fix includes

* update z_player.c/z_lib.c + run format.sh

* merge upstream/master

* fix include in En_Goroiwa

* fix includes

src/libultra_code_O2/sp.c

@@ -0,0 +1,11 @@
+#include "global.h"
+
+u32 __osSpDeviceBusy() {
+    register u32 status = HW_REG(SP_STATUS_REG, u32);
+
+    if (status & (SP_STATUS_DMA_BUSY | SP_STATUS_DMA_FULL | SP_STATUS_IO_FULL)) {
+        return 1;
+    }
+
+    return 0;
+}