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 4b2e32efa4 ("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>

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>

include/configs/socfpga_stratix10_socdk.h

@@ -113,7 +113,8 @@ unsigned int cm_get_qspi_controller_clk_hz(void);
 	"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

include/configs/socfpga_vining_fpga.h

@@ -145,6 +145,7 @@
 			"run ubi_ubi ; "				\
 		"else echo \"Unsupported boot mode: \"${bootmode} ; "	\
 		"fi\0"							\
+		"socfpga_legacy_reset_compat=1\0"
 
 #define CONFIG_SYS_REDUNDAND_ENVIRONMENT
 #define CONFIG_ENV_SIZE_REDUND		CONFIG_ENV_SIZE