intel: System Manager refactoring

Refactored system manager driver to be shared across both intel platform

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: Ic4d056c3d15c3152403dc11641c2452770a6162d
diff --git a/plat/intel/soc/agilex/bl2_plat_setup.c b/plat/intel/soc/agilex/bl2_plat_setup.c
index a27680c..022ead6 100644
--- a/plat/intel/soc/agilex/bl2_plat_setup.c
+++ b/plat/intel/soc/agilex/bl2_plat_setup.c
@@ -18,13 +18,13 @@
 #include "agilex_clock_manager.h"
 #include "agilex_memory_controller.h"
 #include "agilex_pinmux.h"
-#include "agilex_system_manager.h"
 #include "ccu/ncore_ccu.h"
 #include "qspi/cadence_qspi.h"
 #include "socfpga_handoff.h"
 #include "socfpga_mailbox.h"
 #include "socfpga_private.h"
 #include "socfpga_reset_manager.h"
+#include "socfpga_system_manager.h"
 #include "wdt/watchdog.h"