[PATCH] paride: fix up build warning on mips platforms

[Greg Kroah-Hartman]

MIPS include files define "PC" so when building the paride driver the
following build warning shows up:

	rivers/block/paride/bpck.c:32: warning: "PC" redefined

Fix this by undefining PC before redefining it as is done for other
defines in this driver.

Cc: Tim Waugh <tim@xxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: linux-block@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/block/paride/bpck.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/paride/bpck.c b/drivers/block/paride/bpck.c
index f5f63ca2889d..d880a9465e9b 100644
--- a/drivers/block/paride/bpck.c
+++ b/drivers/block/paride/bpck.c
@@ -28,6 +28,7 @@
 
 #undef r2
 #undef w2
+#undef PC
 
 #define PC			pi->private
 #define r2()			(PC=(in_p(2) & 0xff))
-- 
2.34.1