armsr: Fix kmod-fsl-dpaa2-net build

The build failed because the CONFIG_FSL_DPAA2_ETH_DCB option was not
set. Activate this option to build the driver with DCB support when it
is available.

Fixes: 40f1db9cb11d ("kernel: Add KERNEL_DCB (Data Center Bridging)")
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/armsr/modules.mk

@@ -128,7 +128,8 @@ define KernelPackage/fsl-dpaa2-net
     +kmod-fsl-pcs-lynx +kmod-fsl-mc-dpio
   KCONFIG:= \
     CONFIG_FSL_MC_UAPI_SUPPORT=y \
-    CONFIG_FSL_DPAA2_ETH
+    CONFIG_FSL_DPAA2_ETH \
+    CONFIG_FSL_DPAA2_ETH_DCB=y
   FILES:= \
   $(LINUX_DIR)/drivers/net/ethernet/freescale/dpaa2/fsl-dpaa2-eth.ko
   AUTOLOAD=$(call AutoLoad,35,fsl-dpaa2-eth)