Fix some wait_for_valid functions return value from 1 to -1.

codec_init expects wait_for_valid returns -1 for timeout, not 1.

Change-Id: I0f2a3ebb1934d0adaf13765434526bbc9efca9a3
Signed-off-by: Andrew Wu <arw@dmp.com.tw>
Reviewed-on: http://review.coreboot.org/3843
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/southbridge/amd/sb600/hda.c

@@ -208,7 +208,7 @@ static int wait_for_valid(u32 base)
 		udelay(1);
 	}
 
-	return 1;
+	return -1;
 }
 
 static void codec_init(u32 base, int addr)

src/southbridge/amd/sb700/hda.c

@@ -130,7 +130,7 @@ static int wait_for_valid(u32 base)
 		udelay(1);
 	}
 
-	return 1;
+	return -1;
 }
 
 static void codec_init(u32 base, int addr)

src/southbridge/amd/sb800/hda.c

@@ -132,7 +132,7 @@ static int wait_for_valid(u32 base)
 		udelay(1);
 	}
 
-	return 1;
+	return -1;
 }
 
 static void codec_init(u32 base, int addr)

src/southbridge/intel/sch/audio.c

@@ -187,7 +187,7 @@ static int wait_for_valid(u32 base)
 		udelay(1);
 	}
 
-	return 1;
+	return -1;
 }
 
 static void codec_init(struct device *dev, u32 base, int addr)