microblaze: Enabling CONFIG_BRIDGE in mmu_defconfig

This patch enables CONFIG_BRIDGE=m by default to be aligned
with Xilinx defaults.
Signed-off-by: Vineeth Chowdary Karumanchi <vineethchowz.chowdary@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/configs/mmu_defconfig

@@ -32,6 +32,7 @@ CONFIG_PACKET=y
 CONFIG_UNIX=y
 CONFIG_INET=y
 # CONFIG_IPV6 is not set
+CONFIG_BRIDGE=m
 CONFIG_MTD=y
 CONFIG_MTD_CFI=y
 CONFIG_MTD_CFI_INTELEXT=y