autotest: Fix a mistake in the cr50 tast suite.

The tast suites need REQUIRE_SSP=True in the control files.

BUG=chromium:1097693
TEST=./site_utils/suite_enumerator.py faft_cr50_prepvt_tast -a .
TEST=./site_utils/suite_enumerator.py faft_cr50_pvt_tast -a .

Change-Id: I2809bf07c9c95c2d99185d35186679f1c0b5e398
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2274677
Tested-by: Dana Goyette <dgoyette@chromium.org>
Reviewed-by: Mike Wiitala <mwiitala@google.com>
Reviewed-by: Shuhei Takahashi <nya@chromium.org>
Commit-Queue: Dana Goyette <dgoyette@chromium.org>
diff --git a/server/site_tests/tast/control.firmware-cr50 b/server/site_tests/tast/control.firmware-cr50
index 7571003..14da422 100644
--- a/server/site_tests/tast/control.firmware-cr50
+++ b/server/site_tests/tast/control.firmware-cr50
@@ -9,6 +9,9 @@
 ATTRIBUTES = 'suite:faft_cr50_prepvt_tast, suite:faft_cr50_pvt_tast'
 MAX_RESULT_SIZE_KB = 1024 * 1024
 
+# tast.py uses binaries installed from autotest_server_package.tar.bz2.
+REQUIRE_SSP = True
+
 DOC = '''
 Run the Tast tests for Google Security Chip firmware (Cr50).