[XS] Change in coreboot[4.11_branch]: 3rdparty: Add STM as a submodule

[Stefan Reinauer (Code Review)]

Stefan Reinauer has submitted this change. ( https://review.coreboot.org/c/coreboot/+/55625?usp=email )

Change subject: 3rdparty: Add STM as a submodule
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3rdparty: Add STM as a submodule

The patch incorporates the STM build as a part of the coreboot
build.  A separate patch lists and documents the options that
the developer can use.  In most cases the default options will
suffice.

Original-Change-Id: I8c6e0c85edd4e2b0658791553bd9947656e8c796
Original-Signed-off-by: Eugene D Myers 
Original-Reviewed-on: https://review.coreboot.org/c/coreboot/+/44687
Original-Tested-by: build bot (Jenkins) 
Original-Reviewed-by: ron minnich

Change-Id: I901cb429d8050fb2a7c839e8ef29ac3359239d2c
Signed-off-by: Eugene Myers 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55625
Reviewed-by: Stefan Reinauer 
Tested-by: build bot (Jenkins) 
---
M .gitmodules
1 file changed, 4 insertions(+), 0 deletions(-)

Approvals:
  Stefan Reinauer: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/.gitmodules b/.gitmodules
index 1b47275..14782d4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -43,3 +43,7 @@
    url = ../amd_blobs
    update = none
    ignore = dirty
+[submodule "3rdparty/stm"]
+	path = 3rdparty/stm
+	url = ../STM
+	branch = stmpe