igb: add IGB_DCA instead of selecting INTEL_IOATDMA

Add a bool IGB_DCA defined to y if IGB and DCA are enabled, but IGB isn't y while DCA=m.  And thus remove the need to select INTEL_IOATDMA when IGB is enabled, so that non-x86 architectures can build the igb driver.
Based on work/patch from Brice Goglin <brice@myri.com>

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 021e8f167406..c7f020c4f145 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2003,6 +2003,11 @@ config IGB_LRO
 
           If in doubt, say N.
 
+config IGB_DCA
+        bool "Enable DCA"
+        default y
+        depends on IGB && DCA && !(IGB=y && DCA=m)
+
 source "drivers/net/ixp2000/Kconfig"
 
 config MYRI_SBUS