Revert "env: Make _init() expect _INVALID when _IS_NOWHERE"

Upon further discussion, this is not required now.

This reverts commit f6bc5d17af.

Link: https://lore.kernel.org/r/ebd92337-669a-9a0a-0af3-d06b957f3b40@denx.de/
Signed-off-by: Tom Rini <trini@konsulko.com>

env/env.c

@@ -336,7 +336,7 @@ int env_init(void)
 		debug("%s: Environment %s init done (ret=%d)\n", __func__,
 		      drv->name, ret);
 
-		if (gd->env_valid == ENV_INVALID && drv->location != ENVL_NOWHERE)
+		if (gd->env_valid == ENV_INVALID)
 			ret = -ENOENT;
 	}