Deprecate weak crash console functions

The default behaviour of the plat_crash_console_xxx functions isn't
obvious to someone that hasn't read all the documentation. As they are
not mandatory, it is unlikely that the code will be checked when doing a
platform port, which may mean that some platforms may not have crash
console support at all.

The idea of this patch is to force platform maintainers to decide how
the crash console has to behave so that the final behaviour isn't
unexpected.

Change-Id: I40b2a7b56c5530c1dcd63eace5bd37ae6335056e
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

plat/common/aarch32/platform_helpers.S

@@ -8,9 +8,11 @@
 #include <asm_macros.S>
 
 	.weak	plat_report_exception
+#if !ERROR_DEPRECATED
 	.weak	plat_crash_console_init
 	.weak	plat_crash_console_putc
 	.weak	plat_crash_console_flush
+#endif
 	.weak	plat_reset_handler
 	.weak	plat_disable_acp
 	.weak	bl1_plat_prepare_exit
@@ -26,6 +28,7 @@ func plat_report_exception
 	bx	lr
 endfunc plat_report_exception
 
+#if !ERROR_DEPRECATED
 	/* -----------------------------------------------------
 	 * Placeholder function which should be redefined by
 	 * each platform.
@@ -54,6 +57,7 @@ func plat_crash_console_flush
 	mov	r0, #0
 	bx	lr
 endfunc plat_crash_console_flush
+#endif
 
 	/* -----------------------------------------------------
 	 * Placeholder function which should be redefined by

plat/common/aarch64/platform_helpers.S

@@ -10,9 +10,11 @@
 #include <platform_def.h>
 
 	.weak	plat_report_exception
+#if !ERROR_DEPRECATED
 	.weak	plat_crash_console_init
 	.weak	plat_crash_console_putc
 	.weak	plat_crash_console_flush
+#endif
 	.weak	plat_reset_handler
 	.weak	plat_disable_acp
 	.weak	bl1_plat_prepare_exit
@@ -37,6 +39,7 @@ func plat_report_exception
 	ret
 endfunc plat_report_exception
 
+#if !ERROR_DEPRECATED
 #if MULTI_CONSOLE_API
 	/* -----------------------------------------------------
 	 * int plat_crash_console_init(void)
@@ -109,6 +112,7 @@ func plat_crash_console_flush
 	ret
 endfunc plat_crash_console_flush
 #endif
+#endif /* ERROR_DEPRECATED */
 
 	/* -----------------------------------------------------
 	 * Placeholder function which should be redefined by