ARM64: zynqmp: Move CONFIG_AHCI from board file

Move configuration option from board file to defconfig.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig b/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig
index 0663e16..9da0306 100644
--- a/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig
+++ b/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig
@@ -6,6 +6,7 @@
 CONFIG_IDENT_STRING=" Xilinx ZynqMP ZC1751 xm015 dc1"
 CONFIG_SYS_TEXT_BASE=0x8000000
 CONFIG_DEFAULT_DEVICE_TREE="zynqmp-zc1751-xm015-dc1"
+CONFIG_AHCI=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y