arm64: zynqmp: Enable bind/unbind commands for all boards

These commands are useful in connection to usb and other devices that's why
enable it by default.

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 7c10770..7731407 100644
--- a/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig
+++ b/configs/xilinx_zynqmp_zc1751_xm015_dc1_defconfig
@@ -22,6 +22,7 @@
 CONFIG_CMD_THOR_DOWNLOAD=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_SYS_ALT_MEMTEST=y
+CONFIG_CMD_BIND=y
 CONFIG_CMD_CLK=y
 CONFIG_CMD_DFU=y
 CONFIG_CMD_FPGA_LOADBP=y