arm: socfpga: Restructure Stratix10 and Agilex handoff code

Restructure Stratix10 and Agilex handoff code to used by
all SOC64 devices, in preparation to support handoff for
Diamond Mesa.

Remove wrap_pinmux_config_s10.c. Add wrap_handoff_soc64.c
which contains the generic function to parse the handoff
data.

Update system_manager_soc64.c to use generic handoff
function in wrap_handoff_soc64.c.

Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
index f9dd166..5779c55 100644
--- a/arch/arm/mach-socfpga/Makefile
+++ b/arch/arm/mach-socfpga/Makefile
@@ -37,7 +37,7 @@
 obj-y	+= reset_manager_s10.o
 obj-y	+= system_manager_soc64.o
 obj-y	+= timer_s10.o
-obj-y	+= wrap_pinmux_config_s10.o
+obj-y	+= wrap_handoff_soc64.o
 obj-y	+= wrap_pll_config_soc64.o
 endif
 
@@ -52,7 +52,7 @@
 obj-y	+= system_manager_soc64.o
 obj-y	+= timer_s10.o
 obj-$(CONFIG_SOCFPGA_SECURE_VAB_AUTH)	+= vab.o
-obj-y	+= wrap_pinmux_config_s10.o
+obj-y	+= wrap_handoff_soc64.o
 obj-y	+= wrap_pll_config_soc64.o
 endif