arm: socfpga: Move Stratix10 and Agilex clock manager common code

Move duplicated function cm_get_qspi_controller_clk_hz to clock_manager.c.

Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/arch/arm/mach-socfpga/clock_manager.c b/arch/arm/mach-socfpga/clock_manager.c
index f0b15f7..be426a5 100644
--- a/arch/arm/mach-socfpga/clock_manager.c
+++ b/arch/arm/mach-socfpga/clock_manager.c
@@ -4,12 +4,13 @@
  */
 
 #include <common.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/system_manager.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
 #include <command.h>
 #include <init.h>
 #include <wait_bit.h>
-#include <asm/global_data.h>
-#include <asm/io.h>
-#include <asm/arch/clock_manager.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -63,6 +64,14 @@
 	return 0;
 }
 
+#if IS_ENABLED(CONFIG_TARGET_SOCFPGA_SOC64)
+unsigned int cm_get_qspi_controller_clk_hz(void)
+{
+	return readl(socfpga_get_sysmgr_addr() +
+		     SYSMGR_SOC64_BOOT_SCRATCH_COLD0);
+}
+#endif
+
 #ifndef CONFIG_SPL_BUILD
 static int do_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
 			 char *const argv[])