Revert "test: Disable pci_ep test for now"

We now have a proper fix for this test, stop disabling it in CI.

This reverts commit ae8d23a668.

Signed-off-by: Tom Rini <trini@konsulko.com>

.travis.yml

@@ -365,13 +365,11 @@ matrix:
     - name: "test/py sandbox"
       env:
         - TEST_PY_BD="sandbox"
-          TEST_PY_TEST_SPEC="not pci"
           BUILDMAN="^sandbox$"
           TOOLCHAIN="i386"
     - name: "test/py sandbox with clang"
       env:
         - TEST_PY_BD="sandbox"
-          TEST_PY_TEST_SPEC="not pci"
           BUILDMAN="^sandbox$"
           OVERRIDE="clang-7"
     - name: "test/py sandbox_spl"
@@ -384,7 +382,6 @@ matrix:
     - name: "test/py sandbox_flattree"
       env:
         - TEST_PY_BD="sandbox_flattree"
-          TEST_PY_TEST_SPEC="not pci"
           BUILDMAN="^sandbox_flattree$"
           TOOLCHAIN="i386"
     - name: "test/py vexpress_ca15_tc2"