soc/amd/stoneyridge: Enable SSE

BUG=b:66997392
TEST=Flash to Kahlee, system no longer resets when the compiler uses
SSE instructions.

Change-Id: I7c1aed9ecfa6f3496760dcda422ddf184e2a043c
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/21697
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/amd/stoneyridge/Kconfig

@@ -56,6 +56,8 @@ config CPU_SPECIFIC_OPTIONS
 	select RELOCATABLE_RAMSTAGE
 	select POSTCAR_STAGE
 	select POSTCAR_CONSOLE
+	select SSE
+	select SSE2
 
 config VBOOT
 	select AMDFW_OUTSIDE_CBFS