neutrino: Enable CONFIG_DEFAULT_MAPLE

Subsequent to 7b1eb0b ("block: maple-iosched: Update MAPLE_IOSCHED_PATCHLEVEL")

Maple should now be ready for prime time. Let's tentatively set it
as our default I/O scheduler and see how it fairs in 2019.

Signed-off-by: Adam W. Willis <return.of.octobot@gmail.com>

arch/arm64/configs/neutrino_defconfig

@@ -328,10 +328,10 @@ CONFIG_IOSCHED_DEADLINE=y
 CONFIG_IOSCHED_MAPLE=y
 CONFIG_IOSCHED_CFQ=y
 # CONFIG_DEFAULT_DEADLINE is not set
-CONFIG_DEFAULT_CFQ=y
+# CONFIG_DEFAULT_CFQ is not set
 # CONFIG_DEFAULT_NOOP is not set
-# CONFIG_DEFAULT_MAPLE is not set
-CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_DEFAULT_MAPLE=y
+CONFIG_DEFAULT_IOSCHED="maple"
 CONFIG_ASN1=y
 CONFIG_UNINLINE_SPIN_UNLOCK=y
 CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y