[iQue] Import libultra audio library files (#2433)

Note about comments in these files:
The libultra audio library was originally available to developers in
source code form, unlike most of libultra. These files are based on
these source code forms, adapted to meet the style of this project.
The comments in the files as of this commit are, apart from the style,
comments from the original SGI authors.

src/boot/z_std_dma.c

@@ -28,7 +28,7 @@
 #endif
 
 #pragma increment_block_number "gc-eu:128 gc-eu-mq:128 gc-jp:128 gc-jp-ce:128 gc-jp-mq:128 gc-us:128 gc-us-mq:128" \
-                               "ntsc-1.2:68 pal-1.0:66 pal-1.1:66"
+                               "ntsc-1.2:66 pal-1.0:64 pal-1.1:64"
 
 StackEntry sDmaMgrStackInfo;
 OSMesgQueue sDmaMgrMsgQueue;