sp_min: Implement `sp_min_plat_runtime_setup()`

On ARM platforms before exiting from SP_MIN ensure that
the default console is switched to the runtime serial port.

Change-Id: I0ca0d42cc47e345d56179eac16aa3d6712767c9b
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/plat/common/aarch32/plat_common.c b/plat/common/aarch32/plat_common.c
index f5cfee5..d3799d2 100644
--- a/plat/common/aarch32/plat_common.c
+++ b/plat/common/aarch32/plat_common.c
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#include <console.h>
 #include <platform.h>
 #include <xlat_mmu_helpers.h>
 
@@ -13,8 +14,18 @@
  * platforms but may also be overridden by a platform if required.
  */
 #pragma weak bl32_plat_enable_mmu
+#pragma weak sp_min_plat_runtime_setup
 
 void bl32_plat_enable_mmu(uint32_t flags)
 {
 	enable_mmu_secure(flags);
 }
+
+void sp_min_plat_runtime_setup(void)
+{
+	/*
+	 * Finish the use of console driver in SP_MIN so that any runtime logs
+	 * from SP_MIN will be suppressed.
+	 */
+	console_uninit();
+}