arm64: remove secmon

It's been decided to only support ARM Trusted Firmware for
any EL3 monitor. That means any SoC that requires PSCI
needs to add its support for ATF otherwise multi-processor
bring up won't work.

Change-Id: Ic931dbf5eff8765f4964374910123a197148f0ff
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11897
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/console/init.c

@@ -53,8 +53,6 @@ void console_init(void)
 		      "ramstage"
 #elif ENV_VERSTAGE
 		      "verstage"
-#elif ENV_SECMON
-		      "secmon"
 #else
 		      "UNKNOWN"
 #endif