arm: socfpga: agilex: Enable Agilex SoC build

Add build support for Agilex SoC.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
diff --git a/include/configs/socfpga_soc64_common.h b/include/configs/socfpga_soc64_common.h
index f69a55c..4b27483 100644
--- a/include/configs/socfpga_soc64_common.h
+++ b/include/configs/socfpga_soc64_common.h
@@ -87,7 +87,7 @@
 	"loadaddr=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
 	"bootfile=Image\0" \
 	"fdt_addr=8000000\0" \
-	"fdtimage=socfpga_stratix10_socdk.dtb\0" \
+	"fdtimage=" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0" \
 	"mmcroot=/dev/mmcblk0p2\0" \
 	"mmcboot=setenv bootargs " CONFIG_BOOTARGS \
 		" root=${mmcroot} rw rootwait;" \
@@ -155,10 +155,14 @@
 #define CONFIG_HW_WATCHDOG
 #define CONFIG_DESIGNWARE_WATCHDOG
 #define CONFIG_DW_WDT_BASE		SOCFPGA_L4WD0_ADDRESS
+#ifdef CONFIG_TARGET_SOCFPGA_STRATIX10
 #ifndef __ASSEMBLY__
 unsigned int cm_get_l4_sys_free_clk_hz(void);
 #define CONFIG_DW_WDT_CLOCK_KHZ		(cm_get_l4_sys_free_clk_hz() / 1000)
 #endif
+#else
+#define CONFIG_DW_WDT_CLOCK_KHZ		100000
+#endif
 #endif
 
 /*