x86/dma-debug: Bump PREALLOC_DMA_DEBUG_ENTRIES

I ran out of free entries when I had CONFIG_DMA_API_DEBUG
enabled. Some other archs seem to default to 65536, so increase
this limit for x86 too.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Link: http://lkml.kernel.org/r/50A612AA.7040206@canonical.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
----

arch/x86/kernel/pci-dma.c

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 0f5dec5..872079a 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -56,7 +56,7 @@
 EXPORT_SYMBOL(x86_dma_fallback_dev);
 
 /* Number of entries preallocated for DMA-API debugging */
-#define PREALLOC_DMA_DEBUG_ENTRIES       32768
+#define PREALLOC_DMA_DEBUG_ENTRIES       65536
 
 int dma_set_mask(struct device *dev, u64 mask)
 {