Config: Config Base for Hybrid Platform

Add supported configurations for Hybrid Platform in config_base.
Default is "OFF", ergo no functional changes.

Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com>
Change-Id: If5d541a2189dec0e0e4363ef093bbb0505d97697
diff --git a/docs/configuration/index.rst b/docs/configuration/index.rst
index a8ea88c..3fa2eed 100644
--- a/docs/configuration/index.rst
+++ b/docs/configuration/index.rst
@@ -293,6 +293,8 @@
 +----------------------------------------+-----------+-------------+
 |CONFIG_TFM_SCHEDULE_WHEN_NS_INTERRUPTED | Component |   0         |
 +----------------------------------------+-----------+-------------+
+|CONFIG_TFM_HYBRID_PLAT_SCHED_TYPE       | Component |   0         |
++----------------------------------------+-----------+-------------+
 
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