intel: Change boot source selection

Platform handoff structure no longer includes boot source selection.
Hence, those settings can now be configured through socfpga_plat_def.h.

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: If7ec6a03bb25156a6670ebf8f77105c370b553f6
diff --git a/plat/intel/soc/stratix10/bl2_plat_setup.c b/plat/intel/soc/stratix10/bl2_plat_setup.c
index 7d183db..78ca253 100644
--- a/plat/intel/soc/stratix10/bl2_plat_setup.c
+++ b/plat/intel/soc/stratix10/bl2_plat_setup.c
@@ -45,7 +45,7 @@
 	{0},
 };
 
-boot_source_type boot_source;
+boot_source_type boot_source = BOOT_SOURCE;
 
 void bl2_el3_early_platform_setup(u_register_t x0, u_register_t x1,
 				u_register_t x2, u_register_t x4)
@@ -58,7 +58,6 @@
 	if (socfpga_get_handoff(&reverse_handoff_ptr))
 		return;
 	config_pinmux(&reverse_handoff_ptr);
-	boot_source = reverse_handoff_ptr.boot_source;
 
 	config_clkmgr_handoff(&reverse_handoff_ptr);
 	enable_nonsecure_access();