[POWERPC] move variables in drivers/macintosh to bss

Move all the initialized variables to bss.
Mark a version string as const.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/macintosh/via-maciisi.c b/drivers/macintosh/via-maciisi.c
index 1f0aa5d..10051db 100644
--- a/drivers/macintosh/via-maciisi.c
+++ b/drivers/macintosh/via-maciisi.c
@@ -63,10 +63,10 @@
 
 #undef DEBUG_MACIISI_ADB
 
-static struct adb_request* current_req = NULL;
-static struct adb_request* last_req = NULL;
+static struct adb_request* current_req;
+static struct adb_request* last_req;
 static unsigned char maciisi_rbuf[16];
-static unsigned char *reply_ptr = NULL;
+static unsigned char *reply_ptr;
 static int data_index;
 static int reading_reply;
 static int reply_len;