Sync tf_config files with internal CI

Signed-off-by: Zelalem <zelalem.aweke@arm.com>
Change-Id: I064f4f252fe7d3770719dee040feb96ea180a9bb
diff --git a/tf_config/rk3288-default b/tf_config/rk3288-default
new file mode 100644
index 0000000..a33fe80
--- /dev/null
+++ b/tf_config/rk3288-default
@@ -0,0 +1,4 @@
+AARCH32_SP=sp_min
+ARCH=aarch32
+CROSS_COMPILE=arm-none-eabi-
+PLAT=rk3288