binman: Fix up comment in intel-fsp-m

This comment references the wrong FSP component. Fix it.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

tools/binman/etype/intel_fsp_m.py

@@ -2,7 +2,7 @@
 # Copyright 2019 Google LLC
 # Written by Simon Glass <sjg@chromium.org>
 #
-# Entry-type module for Intel Firmware Support Package binary blob (T section)
+# Entry-type module for Intel Firmware Support Package binary blob (M section)
 #
 
 from entry import Entry