Remove stale .rej file

Commit 9778b696 accidentally added
a .rej file (probably my fault), remove it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/iommu.c.rej

---- arch/powerpc/kernel/iommu.c	2012-06-08 09:01:02.785709100 +1000
-+++ arch/powerpc/kernel/iommu.c	2012-06-08 09:01:07.489784856 +1000
-@@ -33,7 +33,9 @@
- #include <linux/bitmap.h>
- #include <linux/iommu-helper.h>
- #include <linux/crash_dump.h>
-+#include <linux/fault-inject.h>
- #include <asm/io.h>
-+#include <asm/vio.h>
- #include <asm/prom.h>
- #include <asm/iommu.h>
- #include <asm/pci-bridge.h>
-@@ -171,6 +261,9 @@
- 		return DMA_ERROR_CODE;
- 	}
- 
-+	if (should_fail_iommu(dev))
-+		return DMA_ERROR_CODE;
-+
- 	if (handle && *handle)
- 		start = *handle;
- 	else