ARM: omap2plus_defconfig: enable ahci-dm816 module

This is now supported on the dm8168-evm board, so enable it in
the defconfig for omap2+.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -142,6 +142,7 @@ CONFIG_BLK_DEV_SD=y
 CONFIG_SCSI_SCAN_ASYNC=y
 CONFIG_ATA=y
 CONFIG_SATA_AHCI_PLATFORM=y
+CONFIG_AHCI_DM816=m
 CONFIG_NETDEVICES=y
 # CONFIG_NET_VENDOR_ARC is not set
 # CONFIG_NET_CADENCE is not set