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/osPfsFreeBlocks.c

@@ -0,0 +1,36 @@
+#include "ultra64.h"
+#include "global.h"
+#include "ultra64/pfs.h"
+
+s32 osPfsFreeBlocks(OSPfs* pfs, s32* leftoverBytes) {
+    s32 j;
+    s32 pages = 0;
+    __OSInode inode;
+    s32 ret = 0;
+    u8 bank;
+    s32 offset;
+
+    if (!(pfs->status & PFS_INITIALIZED)) {
+        return (PFS_ERR_INVALID);
+    }
+
+    if ((ret = __osCheckId(pfs)) != 0) {
+        return ret;
+    }
+
+    for (bank = PFS_ID_BANK_256K; bank < pfs->banks; bank++) {
+        if ((ret = __osPfsRWInode(pfs, &inode, PFS_READ, bank)) != 0) {
+            return ret;
+        }
+
+        offset = ((bank > PFS_ID_BANK_256K) ? 1 : pfs->inodeStartPage);
+        for (j = offset; j < PFS_INODE_SIZE_PER_PAGE; j++) {
+            if (inode.inodePage[j].ipage == PFS_PAGE_NOT_USED) {
+                pages++;
+            }
+        }
+    }
+
+    *leftoverBytes = pages * PFS_ONE_PAGE * BLOCKSIZE;
+    return 0;
+}