arm: vexpress: don't reset flags in board_init to avoid losing previous ones

Re-submitted because of missing description and signed-off.

flags reset in board_init caused bugs when executing command like editenv
because the reallocated flag was lost.
Tested-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Arnaud Aujon Chevallier <arnaud@intelibre.fr>

board/armltd/vexpress/vexpress_common.c

@@ -55,7 +55,6 @@ int board_init(void)
 {
 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 	gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS;
-	gd->flags = 0;
 
 	icache_enable();
 	flash__init();