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_dbm_soc1.h b/include/configs/socfpga_dbm_soc1.h
index b36d7e5..fc1db24 100644
--- a/include/configs/socfpga_dbm_soc1.h
+++ b/include/configs/socfpga_dbm_soc1.h
@@ -87,7 +87,8 @@
 			"echo Running bootscript... ; "			\
 			"source ${kernel_addr_r} ; "			\
 		"fi ; "							\
-		"fi\0"
+		"fi\0"							\
+	"socfpga_legacy_reset_compat=1\0"
 
 /* The rest of the configuration is shared */
 #include <configs/socfpga_common.h>