arm: socfpga: fix 3 boards missing env var "socfpga_legacy_reset_compat"

This fixes 3 boards that don't use CONFIG_EXTRA_ENV_SETTINGS from
socfpga_common.h. They need to enable reset manager compatibility
mode unless all peripheral drivers in Linux support reset handling.

Fixes: commit 4b2e32efa4e7 ("arm: socfpga: gen5: deassert peripheral reset by default")
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reported-by: Wolfgang Grandegger <wg@aries-embedded.de>
diff --git a/include/configs/socfpga_stratix10_socdk.h b/include/configs/socfpga_stratix10_socdk.h
index 8d2971c..90ad817 100644
--- a/include/configs/socfpga_stratix10_socdk.h
+++ b/include/configs/socfpga_stratix10_socdk.h
@@ -113,7 +113,8 @@
 	"scriptaddr=0x02100000\0" \
 	"scriptfile=u-boot.scr\0" \
 	"fatscript=if fatload mmc 0:1 ${scriptaddr} ${scriptfile};" \
-		   "then source ${scriptaddr}; fi\0"
+		   "then source ${scriptaddr}; fi\0" \
+	"socfpga_legacy_reset_compat=1\0"
 
 /*
  * Generic Interrupt Controller Definitions