fix(arm): move console flush/switch in common function

There are some CI configs which apply patch on the fly to test some
unusual test scenarios. After commit c864af989 there is one patch which
does not apply cleanly into arm_bl31_plat_runtime_setup().

To fix this issue move console flush/switch into the caller of this
function.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I4116044d53bef349a707c977cf26d1df65200045

plat/arm/common/arm_bl31_setup.c

@@ -338,9 +338,6 @@ void arm_bl31_plat_runtime_setup(void)
 #if PLAT_RO_XLAT_TABLES
 	arm_xlat_make_tables_readonly();
 #endif
-
-	console_flush();
-	console_switch_state(CONSOLE_FLAG_RUNTIME);
 }
 
 #if RECLAIM_INIT_CODE
@@ -394,6 +391,9 @@ void __init bl31_platform_setup(void)
 void bl31_plat_runtime_setup(void)
 {
 	arm_bl31_plat_runtime_setup();
+
+	console_flush();
+	console_switch_state(CONSOLE_FLAG_RUNTIME);
 }
 
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