arm: socfpga: agilex: Enable FPGA Full Reconfiguration support

Enable FPGA full reconfiguration support with Intel FPGA SDM
Mailbox driver for Agilex.

Signed-off-by: Chee Hong Ang <chee.hong.ang@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>

arch/arm/mach-socfpga/Kconfig

@@ -35,6 +35,7 @@ config TARGET_SOCFPGA_AGILEX
 	select ARMV8_SET_SMPEN
 	select ARMV8_SPIN_TABLE
 	select CLK
+	select FPGA_INTEL_SDM_MAILBOX
 	select NCORE_CACHE
 	select SPL_CLK if SPL