init: rename FEATURE_EXTRA_QUIET -> FEATURE_INIT_QUIET

The former name had no INIT anywhere in its name, sounded generic

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/configs/TEST_rh9_defconfig b/configs/TEST_rh9_defconfig
index 86e13cd..0d72cda 100644
--- a/configs/TEST_rh9_defconfig
+++ b/configs/TEST_rh9_defconfig
@@ -404,7 +404,7 @@
 CONFIG_FEATURE_KILL_DELAY=0
 CONFIG_FEATURE_INIT_SCTTY=y
 CONFIG_FEATURE_INIT_SYSLOG=y
-CONFIG_FEATURE_EXTRA_QUIET=y
+CONFIG_FEATURE_INIT_QUIET=y
 CONFIG_FEATURE_INIT_COREDUMPS=y
 CONFIG_LINUXRC=y
 CONFIG_HALT=y