Fix some spelling errors

Test: m android.hardware.tv.tuner@1.0
Change-Id: I2f1551106a2d18efe0819bea62cd0f9a0679c636
diff --git a/tv/tuner/1.0/default/Demux.cpp b/tv/tuner/1.0/default/Demux.cpp
index 04382b0..d65df59 100644
--- a/tv/tuner/1.0/default/Demux.cpp
+++ b/tv/tuner/1.0/default/Demux.cpp
@@ -735,7 +735,7 @@
             ALOGD("[Demux] wait for data ready on the input FMQ");
             continue;
         }
-        // Our current implementation filter the data and write it into the filter FMQ immedaitely
+        // Our current implementation filter the data and write it into the filter FMQ immediately
         // after the DATA_READY from the VTS/framework
         if (!readInputFMQ() || !startFilterDispatcher()) {
             ALOGD("[Demux] input data failed to be filtered. Ending thread");